Downvoting everything that has some promotion on it is a bit over the top

That's not happened. The very top Trending post recently had bot votes and did not draw (significant) downvotes. Because it was a high value post that actually deserved to be there.

You're seeing mass downvotes on a lot of (not all) botted content because a lot of the botted content is way overrewarded.

I expect that you and other bot owners will evolve (some may not, and may shut down, while new ones start up, but that's how markets work). I can think of any number of ways to make the best how things have changed and are changing, and I'm sure you can too.