Nope Nairo is easily in the top 3 of Smash 4 so him getting destroyed is not a skill thing as him and ally are even, ZS Samus just struggles against brawler type characters so tiers don't factor as much in Smash 4.

Yes it is fair for him to comeback against you because you were careless enough to become complacent and didn't respect the options he had at his disposal against you, this is what Melee and Third Strike fans don't get about the games that followed the whole point is to make sure it's a battle until the very end as you yourself also have that comeback advantage.

Results don't lie dude Diddy was strong but he never dominated in the way Fox and Falco have same with Sheik, look at the tournament results of Smash IV they're varied, a lot of Diddy's winning was done by Zero who is the most adept Smash IV player if you removed Mango from Melee you'd still have 2 other Fox players dominating even new upcoming greats in Smash are Fox and Falco's, Diddy is not even in the same ball park as them. If Zero didn't win the next guy would be Nairo (ZS Samus) if not him it's Dabuz (Rosalina) then Ally (Mario) etc...

Those mechanics aren't predmoinant in tournaments because they've only been recent discoveries and we're in the first year of Smash IV, unlike in Melee these mechanics not working for all situations is why they can have a big impact on the metagame, they become an option for a player rather then a neccessity much like in an RTS you don't always have to build every unit due to the situation you won't always have to use these mechanics, something that if you don't respect you get punished or hit with that come back factor.

Only one of the top 5 players in the world main fox. 

I can easily argue the point. iPhones are the highest selling phones on the market, there not the best phones on the market. VW Beetles are the highest selling cars in the world, there not the best cars. Popularity does not mean the best. Its lke watching Sports, some of the biggest supported clubs in the world arent the greatest clubs in the world.

Popularity can be based off history and age of a product or franchise. Look at COD, its the highest selling FPS on the market and in my opinion its far from the best FPS game to play.

I think you understand now.

and ??? still " You can argue many times how good your opinion is but you cannot beat popularity and general consensus lol" period one against many opinion lol come one. This is the real world.

I think you making some mistakes here... only one TOP played in Meele uses Fox.

There is more viable character in Meele right now than Smash IV.

And for your B tier beating S tier... sorry but it is due the player and not balance at all.

That is entirely opinionated. 

For example, I believe it is the worst.

Yeap... 15 years showing you are the minority.

Except at CEO The top 3 was a Fox battle, I give Armada credit though as he plays Peach, Leffen and Mango mainly stick to Fox. No sorry Nairo is in the top two as S4 goes so skill wasn't an issue it comes down to balance as Mario counters ZS Samus, Ally is good as well but he had a match up advantage which helped tip the balance, it's like picking Dhalshim and having to fight Yun. Again S4 tournaments go against what you're arguing as more characters have broken top 8 and are breaking top 8 in S4 in the period since launch which is why that tier list changes each month, I still remember when Lil Mac and Bowser were claimed to be top tier, a Bowser player made top 8 at CEO funny enough, this is why a number of S4 players are mastering 3 or so characters as you can't stick to one character.

The tiers changes today because games updates... in previous games it was not a option.

Devs changes the balance to try to make the game more balanced... SFIV had a lot of tiers too... diferent from old games that didn't have the chance to change the balance and so the tiers.