I know it's not a solution for you specifically here, but if anyone has access to the CF enterprise plan, they can report specific traffic as non-bot and hopefully improve the situation. They need to have access to the "Bot Management" feature though. It's a shitty situation, but some of us here can push back a little bit - so do it if you can.
And yes, it's sad that the "make internet work again" is behind an expensive paywall..