Engine Grinding Noise problems of the 2011 Chevrolet Cruze

The vehicle experiences a severe delay in throttle and transmission response, to the point of endangerment. When driving at 60-65mph and commanding passing power, the vehicle normally will bog down as the pedal is depressed, then disengage the gear, wait up to 3 seconds, rev up 500-1,000rpm and then engage the gear and begin moving forward (at which point it is within a few hundred rpm of redline and bounces off of the fuel cutoff. . . . While in drive, not manual mode). The transmission also shifts harshly up and down randomly. Upon a cold start, the vehicle nearly stalls when coming out of a parking garage with an incline, then proceeds to idle at 1,800rpm and push the vehicle forward with nearly enough thrust to cause a collision if the brake pedal is not stood on. The vehicle has almost stalled on me while driving on flat ground, a handful of times (sometimes when I turn on the rear defroster, sometimes just coming to a stop). Additionally, there is a pulsating that can be felt throughout the car (most notably through the brake pedal) and a grinding noise coming from the engine bay. The vehicle has been brought in to power Chevrolet in mesa, arizona where these concerns were brought up, including the concern for safety, at which point the ecm and tcm were reset to default values (which made the transmission even more horrible, due to deleting the adaptive values). I was spoken to like a child and given a printout explaining how an automatic transmission and auto-stop feature worked and told that the pulsating (which is widely acknowledged as a bad ac compressor part for this vehicle and was mentioned to the dealer when the car was brought in) and other issues were non-existent. I guess that I will have to wait for these parts to fail, hoping and praying that it doesn't kill me or my passengers in the process, in order to get these issues addressed.