charastev

So, my Chevy went to the dealership back in December for an oil change, tire rotation, transmission flush/refill, transfer case flush/refill and a small electrical problem from the last time they had the truck in their shop. In addition to what I asked them to do, they replaced the HVAC head unit and messed up the wiring causing a short in the truck. They had to jump the truck to get it to the front of the dealership for pick up and again when I got back in it. The battery had been replaced 7 months early. We took it to a local guy who found they had incorrectly wired the HVAC unit into our truck. Fast forward to the first time I tried to tow something with it--less than 500 miles after pick up. I was driving up a hill and got a "Hot Transmission" notice. Ended up getting that diagnosed and heading back to dealership (complete with horse on trailer) to have 4 quarts of overfill taken off the transmission. I was sent on my way and told it was fine. I didn't get 30 minutes and had the same issue. They took the truck did something minor to it and said it was fine as far as they could tell. Without a load, the couldn't repeat the "Hot Transmission" issue.... We took the truck home, knowing it wasn't yet right, and put a load on it. I drove it up one BIG "hill" hooked with trailer and horse. I didn't get the light. But, I was smelling burning fluid--not oil--fluid. The next time I drove the truck the gear shifting was lightly jerky. Guessing that the trailer/horse buffered that so I couldn't feel much. Truck went back in for the dealership to look at again. This time, they were not informed of my previous issues and called to tell me I have to replace my transmission because of internal damage to the transmission. Truck has been driven about 1000 miles since pick up on 12/18/2021. The dealership put on at least 200 of those miles trying to figure out a way to not replace the transmission last time they had it. What's everyone's opinion here? Is the transmission issue my fault or did the dealer kill my transmission with that 4 quart overfill? Thanks for your assistance.