I have spent hundreds of hours smoothing out walls built by “professional” framers and drywallers.
I think a lot of these guys just don’t care.
I just now came back from the house. What these drywallers did was horrible. They even used “wet” sheetrock between 2 other layers. Mold has already started to grow. I have a piece of it now.
The guy who is here fixing it was just amazed at what they did. I just pray the mold hasn’t moved further on.