how do you become a good person when you have people constantly trying to bring you down?

I constantly struggle trying to be a good person and love everyone. But it's getting to the point where I can sense the bitterness and the evil striking in. I don't want that. I want to be a good person and I want to love others and be loved it's just so hard when you have people around you trying to bring you down and crush you. I don't want to be an evil and bitter person at such a young age of 24. I constantly feel like everyone around me is out to get me so I distant myself from everyone. I don't want this to be my life 😔