It is true that there are some major egos and a-holes in the elite ranks of this sport, but I can tell you from years of first-hand contact, Roch Frey, Heather Fuhr, Paula Newby-Fraser and Paul Huddle (the owners of multisports.com) are the nicest people out there. They are beyond funny and completely NOT full of themselves.
And Diana Bertsch, the race director for Kona and 70.3 Hawai'i is an amazing person pulling off an impossible task every year. And guys like Bob Babbitt, who founded the Challenged Athletes Foundation, is an amazing, famous encyclopedia of triathlon knowledge and experience yet is a very warm, modest and friendly guy. There are others, but these are the ones that really stand out to me.
Unfortunately, there is a very long list of self-absorbed, incompetent jerks. But, you just move away from them and embrace the ones that really understand and live what the meaning of this sport and life in general is all about. Just turn on the Pr**k filter and revel in the great people and experiences available.