Road cyclists that get serious are almost always dicks. I don’t know why, tbh. The crowds and people for MTB and CX are much more fun and chill.
I used to ride with the fastest group here, and I pretty much hated all of them minus one or two guys that were very welcoming. It was also clear that although it was a mix of pro (1-2 guys), semi-pro (most) and amateurs (like me) that there was doping at all three of these levels. I was invited into a team, but I told them no thanks, stopped riding with them and shifted entirely to triathlon.
Again, the triathlon community was soooo much more fun and helpful.
If I had to guess the cause, it would be 3 things:
1. Doping ****s your mind
2. It’s a dangerous sport that requires a real edge at the top level. Crashing could bring your death and you have to ride extremely close at high speed to succeed. This isn’t true in triathlon (drafting is illegal), CX or MTB.
3. Every ****ing dork that buys a full kit (even if they aren’t on a team) thinks they are hot shit and pout when they get passed.