Maybe adopting some hard constraints on code complexity that agents have to work within would help?
It's not all bad! It's also enormously fun. I've been able to work on things I'd been putting off forever. When I can use LLM agents, I less often feel paralyzed by perfectionism, which is probably the biggest productivity boost I get. My own code has not decreased in quality, and I think that for the truly important things, neither has that of my colleagues.
But LLMs don't make junior dev mistakes. They make "my brain has worms in it" mistakes.