My experience with the community on the PC version of GO has been much better than it was with Source. I've mostly found pretty friendly people, especially on the community servers. On Source, you could get kicked for not having a kill after the first round and I hear 1.6 is even worse.
Not everybody has played CS their entire life.
The only issue I have with most teamwork-based PC games, like CS, is that hardly anyone has a mic, so it's really hard to co-ordinate yourselves. On CS everyone just seems to run off and do their own thing.