Gotye sampled it to begin with, so he couldn't sue. He couldn't even make money off the original song for that reason, but he seems pretty chill about stuff like that.
Based on other comments, it sounds like Doechii wasn't trying to release Anxiety as its own song and just made it for fun, and then her fans kept requesting she record a real version of it.
So the story is that some people's hobby is just to hate things.
I don't appreciate your ruse.