I don’t think these people were real and actual friends. Sounds more like activity group (or perhaps they are friends with each other but not with you). Real friends don’t act that way. You didn’t like them and they didn’t particularly like you. In general if you join social group that does things certain way, it’s not realistic to expect them to change. You tried to fit in. It didn’t work. It happens. I think it’s important to distinguish between activity partners and real friends.