It's not just gamers doing that. They might be more vocal or passionate about it, but essentially that midset of hating on popular things is not exclusive to gaming. Think of Harry Potter, Frozen or Twilight, for book/movie franchises. The same can be found with music, food, and basically very other aspect of life.

Sometimes a lot of people might just derive enjoyment from something that you genuinely think is bad, and poorly put toghether (this is the case with me and twilight for example, i just don't like it.) Sometimes there might be other factors at play.

I think the assumption that something that appeals to millions of people, only appeals to the lowest common denominator is quickly made, especially if you yourself have only heard of (and been annoyed by) the hype and have not actually seen the product. Also there's always going to be diffrent tastes and just because a lot of people like somesting that does not mean there isn't either a vocal minority disliking it or even a huge potion of people feeling lukewarm towards it at best.

Lasty, whether we like to admit it or not, we all like to belong somewhere, into some movement with likeminded people. We also want to feel special and unique. Siding against the popular thing with a smaller group of people gives social stability while still enabling every member of the smaller group to feel unique and special, after all they all hate the popular thing.

So there you have my psychology-101 analysis, of why we like to hate on popular things.

I'm not saying you're wrong. I kinda just hate the term "hater." There are definitely places where it applies, but not to someone whose criticizing a game based on accurate statements. That's making a well thought out argument as to why these games aren't good, and why I won't be buying them. The OP is suggesting that most of us are criticizing the game because it's "big." That's not the reason, it's because these games bring absolutely nothing new to the table almost every year. 

Considering hate is what drives people the most these days, I'd say you're a hipster for liking almost everything.

Sums up my thoughts almost exactly.  I have no interest in ANY yearly franchises that are clearly just commercial cash cows. No developer can have enough fresh ideas to keep a franchise innovative on a yearly basis.

we love this industry and those games are killing it.

internet.

Have you been on the internet? Everyone hates everything that's in. When something is popular that they don't particularly like, they obsess over it until they convince themselves that they actually hate it and that it sucks. Human nature, I guess.

I've seen that with other mediums as well. You tend to see a lot more hate for popular things.

This is simple statistics really. If something is popular, just by that definition more people will know about it and thus there will be more haters (because there'll always be those who dislike something no matter how good it is). It just so happens that haters tend to be more vocal since the people who are enjoying it are probably just enjoying playing the game, unlike haters who don't want to play the game but at the same time want to hate on it, and hence spend their time talking more about it.

Ummm im actually happy when the game i like gets popular. i.e. bloodborne
I also dont mind games like Assassins creed, or zelda
just because they maybe be popular and overstaturated. I like what i like.

however i get really angry and annoyed at the elitists that think when a studio/game try to do something different and get alot of hate for it. Then hate on anyone that actually likes the game. I.e. DmC

I also dont like the elitists that need to prove that a game is good or worth anything because of a metacritic score. 

Because a niche hobby which was good the way it was gets destroyed by stuff that mainstreamers (who think they are gamers/part of the original group) like.

Then the developers that usualy made stuff for the niche fans betray the original group and also do more and more stuff that the mainstreamers like (that sadly outnumber the original group) and the hobby gets destroyed more and more. The devs sometimes do this on purpose because of $$$ or because they dont know that there is different groups of "gamers".

This happened to alot of hobbies groups etc. music genres fucked up. Movies turned into MichaelBay-Fireworks even social groups be it Nazis or Emos or Hipsters or Punks or Metalheads(sry if this is offensive I have no idea how to call them I will change as soon you guys give me a better word) hate that pseudo-members of their group hijack the group when it gets more and more popular and one day the opportunists outnumber the origianl peopl. Even 4chan has this "oldfag vs newfag".

The original "message" is completely lost or is deformed so bad it loses its meaning and then the original group has to deal with that crap forever or is left with the debris when being part of that group is not "IN" anymore and the "opportunists" moved on to be part of something else.

You can losely compare that to "hey cool I am a proud INSERT COUNTRY-citizen because my country is cool etc and then somehow alot of outsiders came to the country it gets more and more fucked up and then everything our predecessors build turns into shit."  So basically the "native vs immigrants" thing.

I mean I dont hear the majority or gamers hate GTA as much as COD simply because GTA kinda deserves its success. And is not just a marketing monster. Its a well build well planned game that is in development for a very long long time and you can feel it. It has its flaws but the whole experience is great.  Even successful games like the NSMB series get hate because after the 4th game with the same music with the same stock photoshop effects with the same "you name it" deserve the hate because they are lazy. 

But because lazy effort products sell well (often thanks to marketing) this signals that lazy can mean successful.
That everything needs to be streamlined and that things need to be changed so that the mainstream group likes it (Dante I am talking about your hair!).