This is basically what I discovered as well. I have found that Ai writes code that is complex and “works” (at least most of the time) but it is heavily over engineered and often contains design choices that make expanding functionality effectively impossible without a full refactor.

When I tried having the Ai fix a test failure the Ai would either fix the code, fix the test, or change the test and the code breaking everything else in the chain.

I no longer use vibe coding because it is just faster/better for me to write the code.

But for tiny scripts it is very good.