That is not true.  In 2D fighters specifically, when you have a super combo, if your health is at 1, many of these supers will not kill you until the final hit.  If you are able to break free of one of these supers, the game is not over, which can and does lead to a match turning out differently.

If I have one point of health, and you have 5, if we're playing Marvel Vs. Capcom, for example, and you do venom web, I will let you hit me with it.  Why? Because only the last hit kills.  Letting someone hit you that way is an easy set-up, to kill the character.  Venom web is a terrible attack, since you can tag out during the active frames anyway, but...  What you say isn't true, and because of that, I use it to my advantage for opening up people's defenses.  Though, honestly, it's just a fun little bait.  You hit me with venom web, and yet, you still die.  Despite having more health. Despite hitting me 1st.

I'm not even going to bring up chip damage, since I think you know about it, but failed to mention it.

And, what about the IF.. That's a small IF.  every attack builds your super meter, which is brining you closer to your goal.  That's why you can't camp out by yourself, while someone else is getting beat on all day.  Just don't miss.

There are consequenses for missing in every fighter.

oh to be a memorable character it need to sell a ton ? You know those 3 but some people might not know them same for a sony fan knowing characters and like them and you dont know them , first time i saw king dedede and rosalina was in a stream about smash last E3 , wii fit girl is not what i call a memorable character.

But that's my point: Sony lacks such characters.

Come on, man. The three characters you named appear in over 100 million sold copies. At that point it's basically impossible to make an argument that they are hardly known.

I dont know, maybe you should ask the thousands of fans that hated it. But seriously its a ba balance for competitive play. Many flawed reasons in it really. I mean you can do all this work, miss a super and practically the entire battle (for you) is pointless is just one example

Come on, dude. You should know better than that. There is no way you can make this claim considering that a) the game sold only around 1m, b) many actually liked them (I know I did), and c) some of the posts you see on different sites are from the same people. You simply can't know just how many had a problem with them or even if the people who did complain about them even played the game (and don't tell me you haven't noticed people pretending to have played a game only as an excuse to trash it). 

Cant find the article but it was a little after the release, it was about a community trying to make a competitive scene, and many players practically said its a bad idea do to character balance and especially te mechanics.

Not saying its a bad game in the sense its unplayable, i played the game on vita for a little while, and it does seem fun. immore talking on a competitive level like most fighters are or at least try to be :)

Yeah, I get that but my problem is simply with one word: thousands. It could have been hundreds or hundreds of thousands. Just say many. I know it sounds stupid to complain about something so insignificant. It's just a pet peeve of mine. If you don't have concreet evidence, don't try to come up with a number.