Charizard in general, especially after GenIV where what competitive viability it might have had was pretty much torn to shreds thanks to stealth rocks. :/
Seeing as how the big guy's my favorite Poke, I feel like I have to address this.
Charizard ain't perfect, any real fan of his would know that. Only ignorant fools would overrate him. At the same time, ignorant fools also underestimate him or write him off as crap. Despite his crippling weaknesses during the 4th and 5th Gens, he's still a good Pokemon and didn't deserve the vitriol that he got from the newer fans and the competitive community during this time.
I feel those days are behind him now. Gen 6 introduced his 2 variant Mega Evolutions which makes him one of the best Pokemon in the game to use and is fully deserving of the praise that he gets now.
On to the topic at hand.
Blaziken- He's monstrously powerful, I acknowledge that, but I feel that he takes way too much praise and attention away from the other 2 Hoenn Starters who, quite frankly can hold their own and are equally as useful (in game at least).
And for anyone who wants to point out that the same argument can be made against Charizard, think about this. Charizard badly needed the help so that's why he got 2 Mega Evos and Venusaur and Blastoise got great Mega Evo's as well, however, Blaziken was already Uber powerful; he didn't need a Mega Evolution and he was the only Starter outside of the Kanto Starters to get one.
Also a note to the OP: If that's your intention, please refrain from using that derogatory term (genwunner, ugh) as a blanket term for all of us who like Charizard and favor Kanto/ Johto more than the newer regions. It doesn't make us any lesser fans of the franchise and it certainly doesn't make us like the ignorant people you refer to.
If that wasn't your intention however, please ignore that last comment.