First of all, there is al ot of hate for gen 6 atm. People dislike the regional design, which they deem to straightforward without any challenging caves or the like, the worst lack of postgame since gen 1, the "dumbing down" of difficulty (most notable XP share and Lucky Egg) in general, the small amount of pokes for gym and elite 4 leaders, and many other things make pokemon X and Y recieve their fair share of "hate".What I'm not currently understanding is why Kalos isn't susceptible to the usual new gen hate. Probably because of CHARIZARD and KANTO, but still it is odd.
But I guess you have a point with your remarks about Charizard and Kanto. I myself found it a lot easier to get into the game because there were so many pokemon I already knew. This troubled me greatly in Black and White, where every single pokemon until postgame was a new one. So not kanto per se, but the fact that you encountered familiar pokes was a plus for me.