When you have haters, you have lovers.
If you have no haters, you are not bold and known enough.
Eventually someone will hate your guts. For sticking out too much. For speaking the truth. For being strongly opinionated. For being wrong. For being pretty. For being rich.
People hate what they cannot have and here's a way to handle them
Your first basic response is to ignore. It costs no energy. It might sting a little but ultimately ignore. You see this very often used by politicians.
You agree to what they say. "You're so stupid!" You reply, yes I am.
What are they going so say after that? There's no more to be had.
"You're so stupid". You reply, "Yes, in fact I am the dumbest of all my friends"
You one up whatever statement they made.
When dealing with hater, the only thing they crave for is attention. If you could steal that away from them, you're basically robbing them their life force.
The last thing you want to do is be defensive. It's going to spiral down quickly. Waste your energy, time and money.
As my favorite saying, if it's not revenue generating, why bother.