You might want to read book and book, the latter being seminal in soft skills.
As an omnivert I can tell you just accept that some people won’t like you. Sometimes that can be a lot of people. Just remain calm and don’t take it personal, that’s important for your self respect but also because other people will treat you much better.
Leave the problems where they are. Some people like to take their frustrations out on a by them perceived to be lower status member of a group, and there’s various ways of dealing with that. A good start is to simply ignore it. The truth is that a lot of people kick down instead of look up, and you are free to judge them for that. If you are sure what you did was right, then stand by it.
There’s so much more I can say but you’ll want to start there in my opinion.