crappy materials mabye, that are just wearing out prematurely?
What I don't understand, and that I find hard to believe, is the braking. Over the course of high school auto shop, we screwed around with (and destroyed) several vehicles, and some of them got pedal to the metal, and full brake. the engine overwhelmed the brakes, but they certainly restricted speed.
Also, pulling the e brake is going to drop speed, and as mentioned, there are no electronics there to screw up.