I'm sorry that you had such a terrible experience at college and in the anime club. I certainly don't think that everyone has experiences like these, but sadly, lots of people do. I can say that from my experience, going to work or college isn't any different than high school. Even the people I work with who are in the ages of 30 - 60 are still about as mature as they were when they were 15 - 18. There is so much drama there and they are always spreading rumors and talking shit about each other behind each other's backs. I have no way of knowing what things are true and which ones are not, since I barely trust anyone in the first place.
Luckily I haven't been there long enough for those things to be a problem for me and I try to be as nice and helpful as I can to everyone so it doesn't become an issue, but even then, it won't protect me forever and I imagine that going to another job will put me in the same type of environment, just with different people and different stories. I am convinced that there are more horrible people in our world than good ones, which is why I want to leave it as soon as possible. I didn't make any friends in college either and I dropped out because it was a waste of time and energy anyway.