We only had one Tesla (2020 Model 3)
Picked it up from the Birmingham Delivery Centre during Covid, so touchless handover. Found the car parked very close to the car next to it on drivers side, Managed to do the normal walk round checks, found nothing major accepted the car and drove off.
Stopped 3 miles from the Delivery centre to get something to eat, found the inner wheel arches on drivers side also the sills and underneath covered in white gloss paint, which was dried it was also on the lower bodywork and could be seen from marks they had tried to machine polish it off.
Wheel arches and underside had been painted with tyre black to hide the white paint which had started to wash off in the rain as we drove.
took it straight back to delivery centre and they said we much have run over a paint can, (Despite it being completely dry gloss paint). Refused to help and denied everything
So its Not just MG all brands can have dodgy practices etc and it can vary from site to site.
Our First Hyundai Kona developed charging issues at 18 Months / 77k miles. Hyundai were unable to resolve and despite head office techs trying a few times did not resolve... (There were other issues including a lot captured on video that could have played badly for Hyundai), and they resolved by putting us in a new car. But on our 3rd Kona when the Drive Battery failed at 5 months old 20k miles they were much less helpful., (Part of the battery recall for faulty batteries, but ours failed before a replacement battery was available) we were told wait was between 6 months and a year for a new battery and were forced into a buyback which left us well out of pocket bearing in mind what we paid for the car and they were now rocketing in price.
Long waffly way of saying, no matter the manufacturer / dealer you will find good and bad and its always a roll of the dice after the 30 days initial period