[mothered]

personally, because of my nice and polite behaviour, i feel like im treated like shit all the time

I understand where you're coming from but unfortunately, you have no control over other people's behavior.

What you can control, Is whether you decide to take It on board and needlessly deal with their negativity, or disregard It altogether and get on with life. I've applied myself to the latter from a very long time ago, and couldn't be happier. Just remember: "They're the ones with the problem", so don't become a part of their equation. You know what you're worth and that's all that matters.