2018 Nissan Altima drivetrain & axles problems

Driving along interstate slowed down for traffic light and when I stepped on the gas to accelerate, vehicle would not go even if the accelerator was on the floor could not get above 40MPH and RPM were between 4&5 was almost rearended by other traffic. Happened two more times on the highway. Also when driving through slow traffic feels as if transmission is jerking and power is lost.

Air cooling system does not work. It will not blow any cold air. Attempted to put freon only for it to burst out a pipe. I was told there is a leakage. When driving and trying to change gears to drive there is a very ugly grinding noise and gear switching is hard. Back up camera goes in and out. Sometimes it's just a black screen. This only happens when reversing.