Suspension Noise problems of the 2011 Honda Civic

Driving the car for one year now I have noticed that the brakes make a pop noise after going in reverse then forward, also a fews times the car brakes feel like its not really slowing the car down from freeway speeds and almost casued a few accidents by not providing enough braking power. The suspension is inadequet for the car it bottoms the rear of the car with <100 lbs inside. The car tends to jump forward when decelerating by coasting and applying the brakes right before the auto level is reached has almost caused a few accidents from the car jumping forward about 1-2 feet also feels like a whiplash effect when it does this. Also when going from 0 to 10 at an intersection to move quickly out of the intersection the car does not have power and moves at a slow pace compared to the rpms. Dealer says the pop noise is a gap in the brake pads and the jump effect is possibly due to the ac disengaging but the ac was not disengaging at the time.