Bad hitch install

I'm camping with my buddy right now. He has GMC terrain Denali (nice ride for what it is) and he had a large RV dealer install a hitch to it when he purchased his trailer last year. His trailer is 2,700 dry, so it's at it his limits. As we were at the last camping spot yesterday, he says that when he lowers the hitch on, the hitch starts to bend down towards the ground. I tell him when we hitch up in the morning (this morning) that I'll look at it.

He goes to hitch up, I thought it was a loose hitch because I've seen the lower bolt loosen up. But that was tight. He lowers the trailer on and sure enough, it starts rotating to the trailer where the hitch was almost a 45 degree angle. Well we didn't have time so he raised it up and put on the WD bars and it looked fine.

We get to the campground now and I crawl under the car to look. The installed receiver hitch has 4 bolts to the frame. 3 of them were finger loose. You could hear me touching them they were so loose. I got them tightened so all is good now. Well I told him when he gets back he needs to take it in and have them torque it properly as I couldn't get in there to properly torque it.

Point is, even tho it is a large, national RV dealer. Their mechanics suck and by not doing their job right, he could have had a disaster.