BabyTanuki
Yeah, you see. I didn't mean to dishearten you, but nothing you can do will be effective. Actually going to patreon won't be too, if they really want to pirate your work, copying from patreon is the same.
The most you can do (and in my opinion, it is the way to go about it) is to find a way for those who are reading from pirate sites to come to real you.
Unlike SnoozySloth is saying, unfortunately, not everyone there knows that it's a pirating site. (When I was younger I was there a lot because they pop up first on search engines, and I didn't know all that complicated stuff about pirating when I was 13 or 14.) Many people who only read and don't know hardships of being an author can be deceived. They might even think that they are supporting the real author.
It is sad, but it is the truth.
So, be strong.
And as you can't really destroy them, find a way to use them. Or ignore them. As SnoozySloth says, they won't bring you money anyway, so why worry about them))
I hope you won't get disheartened. Ganbatte!)))