I'm sorry for assuming you were bothered by it. I actually don't know you so well. Most of your posts do see great though and I know quality and dedication when I see it.
I know many people who are bothered by this guy aren't just profit-seekers who see the downvotes purely as a cut into their earnings. Most of the people complaining probably are genuinely hurt and insulted. However, I still think people should take downvoting a lot less personal.
I just choose to completely ignore it and consider it a cost of trying to seek rewards from posting.
Maybe standing up to him will work and I hope it does. But I still don't think of this as bullying. I think there are other deeper issues involved.
A consensus has developed regarding what is the right and what is the wrong behaviour on Steem. His behaviour is clearly wrong according to that consensus.
Without a centralized authority, maintaining balance will never be easy. There are some deep rifts on Steem. Some people want full out vote-buying to come back. Others don't like this grey area.
If I had to guess. He is the clown who won't find a new target (his net is already so wide). He wants free downvotes gone and perhaps vote-buying to come back (you mentioned he owned a bot).