You can join the resistance. Their bot upvotes the victims and downvotes his self upvotes. It doesn't have a lot of power yet as they are all small fish and not that many of them.

You could do some research on grumpy and expose what you find.

You could help his victims like Kusari, with upvotes or whatever assistance you can offer.

I think the best thing is for there to be awareness about what the cat is doing that people are not seeing.

Really anything can help.

Sorry to respond so late. Having my page hijacked has made some things get lost.