Maybe it is because some design decisions are really bad. The PS4 and Pro are super lame compared to any modern PC because they have no real GPU. And the Switch is generations behind and cannot compete at all, they just used the wrong chip and the dock should not be an empty piece of plastic but contain a secondary SLI GPU instead.

If you just want a Nintendo home console that is substantially more powerful than the old and extremely lame Wii-U you are left alone with your money because Nintendo does not offer home consoles anymore.
Why buy new hardware if the Switch is not more powerful than the outdated Wii-U and games like Zelda look nearly the same? It is just a waste of money at the moment, unless you really use the mobility.

I'm someone who is very much against mid generation upgrades, regardless of who does it, because it greys the line between new generations, as well as break trust from the companies. It's more likely to encourage consumers to wait when new hardware releases, with the odds of revisions happening only a few years later. If you're one of the early adopters, you could feel a sort of burn from this action. Sure, you don't have to buy it, but it shows that in the long run perhaps waiting was the better option. It becomes unclear when it's the right time to buy hardware and could early sales of systems. I think that is terrible, and something I don't want becoming a standard practice.

Inability to support more than one system. Those who support only one system takes their current system as their existence. Emergence of rival platforms can "threaten" their console aka existence.

There are some possible reasons for this.

In therms of mid-gen upgrades like the PS4 Pro and Scorpio:

1. Those who bought the original version of the console might feel cheated because a stronger version comes out so soon afterwards. Thinking that a mid-gen upgrade comes out may keep potential buyers from buying a console just to wait for the better version. It's what basically killed the sales of the Sega Saturn outside of Japan btw because of the Megadrive/Genesis mid-gen upgrades Mega CD and 32X, which where half-baked in themselves. This leads us to:

2. Video game history buffs might point out that this never worked to the console producer's advantage in the past. The SupergraphX was dead in the water with only 8 games specifically using the upgraded version of the TurbogaphX, the Sega CD/32X actually hurt both the sales of the Megadrive/Genesis and those of the Saturn later on because people thought an improved version would come out soon (... again!), so they where waiting until it was oo late for the Saturn to recover; and the Atari 5200 was just a massive flop altogether, even taking out it's horrible timing at the north American video game crash of 1983.

3. The upgrades might feel half-baked to some, especially in the CPU and RAM departments. The Jaguar basically acts like a handbrake and not increasing the RAM on the PS4 Pro means it will probably not be able to use things like higher resolution textures than it's base model.

In therms of the base models (PS4, Xbox ONE and Switch)

1. Being very weak compared to a PC at their release, especially with it's ultramobile CPU.

2. The Xbox ONE gets especially hit since it will get most probably surpassed by the upcoming Raven Ridge APUs in all domains, be it the CPU, GPU performance or even bandwith

3. The Switch is a special case. It's portable, it's using ARM, cartridges,32GB eMMC Chip instead of a Hard drive and so on. It gets criticised for it's weak performance and low battery life, among other problems like the joycon connection, and simply because it's different

PC owners criticising consoles as a whole:

1. Older PC owners often criticise consoles because so many former PC only games got ported over to consoles uring the last gen and devs made these the base versions. This fekt both as a betrayal and dumbing down since many mechanics had to be changed (in most cases simplified) in some games to work with a gamepad.

2.Adding to point 1 are lackluster porting of games and poor optimisation on PC still being widespread today. Just look at Arkham Knight's disastrous port or the latest PES games on PC still being based on the 360 version and the number of PC ports still coming with a 30fps framelock despite a gaming PC having no problem running these games at over 60fps. Or games porting to PC with a gamepad control scheme with no way to rebind the button layouts.

3. The general feeling that consoles are holding the PC back. only a select few games, almost all of them PC exclusives, are really pushing the PCs capabilities to the limit. The low power of the jaguar Chip in the consoles is also felt very much; CPU upgrades where very useful until around 2010, but a Core i5 2500k still suffices for modern games despite being over 6 years old by now.

It is not that big sonny, you should see in our days of NES vs. Master and SNES vs Mega Drive, that was a lot of hate.

Also, Xbox360 x PS3, now, that was a bloody fight.

As always, we do not have money to buy all consoles, so we choose the best for us.

And to justify it, we find flaws in the stuff we can not have.

This is why I always say young, tall, gorgeous women are evil and dumb...

Well, in North America it was not much of a fight, the NES crushed the Master System. I guess you're from Brazil though, where the Master System actually was popular, but was there really a fight there either? I don't even know if Nintendo ever sold NESs there.

Why is that? Improved graphics and hardware allows for new game mechanics and higher degrees of immersiveness.

You aren't wrong that a PC is massively ahead of the Playstation 4... However. The Playstation 4 most certainly has a "real" GPU. It's packaged differently. Sure.

Oh yes, we had generic third part NES clones from brazilian companies since very early on. Here some examples:

So you use one isolated event as proof that PC gaming is more local multiplayer focused and has more spectatcular events? Dreamhack doesnt proove anything, its a fact that console gaming is favoring more local gameplay as i can just give over my controller to another person. There wouldnt be a need for lan parties like Dreamchack if it would be so easy on PC.

It's fine if you like the idea of mid-grade updates. I just don't. I wasn't fine with it when it happened with the New 3DS, and am not fine with it now. It ultimately comes back to 'Should I buy this console now?' If the practice of mid generation consoles becomes a standard thing, then that is a question that will always be there. It becomes more so of 'When is the right time to buy this console?', which I see it as hurting the early start of one.  It could become more of a waiting game and kill the momentum a console needs in the 1st place. And with console makers needing to make their next a more powerful console has been that way since the beginning. Eventually hardware becomes obselete and needs to be replace. Having mid gen consoles doesn't really change that. It's just a slightly better option. Sure, it may not really matter in the end, but it goes back to 'Maybe I should wait longer for something better?'