Totally depends, they were just looking for key words say "shit". But that could be used as

- "This shit is awesome!"

or

- "This shit sucks..."

totally different meanings.

In my experience with curse-worded commit messages it means the codebase is very frustrating and working on it feels like editing hack upon hack to get small changes to work. The curse words either are for "heck yeah, it finally works!" or "try again for the 12th freaking time"

If your project makes me angry, that is the best sign you will ever see. If I'm angry because of duplicate code, quick hacky fixes, stupid function signatures, outdated and harmful comments and workarounds, chances are I'm going to stay awake that night to sort it out.

Angry is good.