I don’t think you’re doing anything wrong. Some shops just have very low quality bars where they can ship things that are to be frank, broken. I tend to use Sonnet 4 these days, and use it for tasks that aren’t too important or ones that require prototyping and iteration over perfection.

I find it’s really great for augmenting specific kinds of concentrated tasks. But just like you, I have to review everything it creates. Even Claude Opus 4 on MAX produces many bugs on a regular basis that I fix before merging in a change. I don’t mind it though, as I can choose to use it on the most annoying areas, and leave the ones I enjoy to work on myself.