Being treated badly is only a perception of the one thinking they are treated that way. Life is not easy and we all have to deal with other people and what they think, say, or do. They may think you treat them badly as well, and you just don't realize it.
Suicide is a cowards way out. Nobody can throw enough stuff at you that you cannot handle.
Many people feel sorry for themselves and commit suicide and then they are forgotten by most except for those they hurt the most my committing suicide.
Immerse yourself in serving others and see how that works for you. Treat people good and do for them and see if that makes people treat you better.
While I won't say that treating other people badly is acceptable, I will say that I feel like everyone has a responsibility to learn how to say--that person is full of shit, I'm not buying into it, and move on. I'm trying to teach my son that right now. The fact is there are always going to be some difficult people to deal with around and the more you don't take in the crap they do and say, the better off you'll be. But I've also been right where you're at before and it isn't a fun place to be. I hope you will consider that nothing anyone says or does is worth your own life. Hugs🤗