Transmission Gear Slipping problems of the 2015 Cadillac Escalade

My 2015 Cadillac Escalade has been in the shop for 130+ days in the first calendar year for defective brakes, transmission, suspension, electrical, and hvac. I have contacted gm and they don't want to repurchase the vehicle. The vehicle is constantly in the shop for problems and it is not a vehicle that should be operated on public roadways. The transmission has been replaced once before due to defects in design and build quality. The transmission how causes the car to take off in 4th gear rather than in 1st gear which means the car feels as if there is no power to propel the vehicle. The transmission slips and feels as if it is broken. I have taken it to the dealer at least 5 times and gm now does not want to replace the transmission even though the dealer has verified the concern and documented it. I feel that gm is not doing enough to ensure safe vehicles are on the road. This transmission issue is going to cause an accident one day. I have already put gm on notice all the way up to the executive level and they don't want to do anything about it. I feel that NHTSA should investigate the issues that plague 2015 full size gm SUV owners. There are a lot of us out there according to my research.