People are sadistic cunts

It's fun for them.

means that they dont deserve you :) theyre prolly just jealous of how good and kind you are! be happy my dude! life is too short to care for stupid people

because you are too nice to others

The truth is there are people like that and there are nice people

Being too nice makes you easy target for bullies

Hmmm. I think got a few things to consider:
1) do they usually talk/act like that? If yes, maybe they dk they’re hurting u.
2) if they know they r hurting u and still continue, time to leave them (as much as possible, but if family, abit tricky).
3) karma (idk if u believe in it but i do, so is possible that u might have hurt them before hence it’s coming back to u. Be kind whenever possible so to break this cycle bc karma always time lag)

Cos they’re hurt themself

I am also being hurt by the person that I trusted the most. But I just live with it.

Well, gotta forgive them if they have social irregularities. But it's just in their nature to do it, and sometimes not even aware of their own actions. Lack of sensitivity etc. Just hold true to yourself, that's all that matters.