People who like Charizard: most people 20 years old+ People who don't like Charizard: baby children who never played Pokemon before 4th generation.
Mystery solved. It's not a nostalgia thing, but younger kids just can't understand the context of the 90s wherein lame fire-breathing lizards with wings were COOOOOOOOL. Hell, all the Pokemon were cool. If the original 151 were released now, most of the community would throw a fit over Pokemon like Jynx and Voltorb.. I don't know why kids these days have to try so hard to prove they're cool, or why they think disliking things makes them cool... Also, trolls.
I'm most likely older than you TC, you college hipster child. Actually its the other way around. People who obsess over Charizard: college scrub with the mindset of a 10 year old, ignorant about stats and anything an adult should know, still being like a 10 year old who only judges on appearences.
People who know that Charizard is bad: legit pros who know that Charizard is bad and outclassed in many ways and aren't just hardcore noobs.