I've been showing AQHA for over 15 years, and I've met a ton of super nice people and some snobby people. It's simple...I don't hang out with the snobs so it's like they don't even exist to me. The big name people win...simply because they have the best horses. I've only see politics come into play a few times, but I don't let it bother me. I know quite a few World Champ trainers, and quite a few judges (I was on AQHA's Show Committee for 5 years so I met a bunch), and they really do a good job at being objective.
In all honesty, I've met more snobby people at open local shows which is why I stopped showing on that circuit a long time ago.