Careless people never used to be able to create such absolute volumes of garbage that flood the system. Open source projects used to be able to just have an open PRs system, because the effort to create and submit something is quite hard, it's a natural filter. Now automated agents can flood a project with hundreds of useless PRs that disguise themselves as being real.

I've had exactly the same feeling. Since the beginning of time, it has generally taken more effort to build something than to review it. This is no longer the case, and it completely breaks some processes.

The quick solution is to escalate the arms race, and start using AI to filter the AI slop, but I'm not sure that's a world I want to work in :)