Drywall crews are slobs. ...
This reminded me of a crew that I had to deal with about a dozen years ago, give or take. The home owner was acting as the GC and I was charging her by the hour to do what she wanted, and to fix what was done wrong. She saved a buck finding the cheapest crews to do things, they spent what she saved, and then some, paying me to fix what they did. She was going to get rich flipping houses, but never came in on budget and eventually her husband lost too much money on her flips to support her on it anymore, and then they moved away.
This one sheetrock crew that I'm remembering was really bad. They rarely nailed all their sheetrock up, so I had to come in after they had left to finish it with screws. I don't like nails in sheetrock. They would nail the edges, and maybe a couple of nails in the middle, but nowhere near enough to consider it done. After three days of hanging sheetrock, they where done and we never saw them again. The tapers showed up and it was a crew of about 10. They where everywhere, with half of them looking like teenagers. That's probably where the problems came from. Somebody must have thought it was funny to fill in the outlet boxes with mud and float the opening so that it was impossible to see where they where once they where done. Sadly, I didn't catch this until they where all gone, the walls where textured and painted.
When the electrician couldn't get power to all the outlets, we realized what had happened and had to hunt for the boxes that where covered over. The owner of the company denied that his people did this, and refused to compensate my client for causing such a huge delay and expense. For years, I badmouthed that company and told everyone that I knew who was wanting to hire a sheetrock contractor not to use them. I have no idea how effective I was, or if their reputation continued to get worse over the years, but after awhile, I saw that the building that they where using was up for sale and I've never heard of that business again.