So what would be a good solution to this? What is something simple that bots are bad at but humans are good at it?

I work in a related space. There is no good solution. Companies are quickly developing DRM that takes full control of your device to verify you’re legit (think anticheat, but it’s not called that). Android and iPhones already have it, Windows is coming with TPM and MacOS is coming soon too.

So linux users are about to be blocked everywhere unless they install malware. I think I would rather just live with a dead internet.

I don’t have this problem because I use Windows