I opted for Bunny Shield exactly to combat bots, in particular ones that spoof User Agents and rotate millions of IPs. It works great, detecting the vast majority of bots and challenging them. Much more user friendly than Cloudflare too, which typically resorts to challenging everyone (not that CF was ever an option due to various concerns).

I also added various rate limits such as 1 RPS to my expensive SSR pages, after which a visitor gets challenged. Again this blocks bots without harming power users much.