i think you just got beginner bad luck with nitro.
sure battery is a more charge and go type thing. and thinsg dont vibrate loose as much as with nitro, but get your self some thread lock ($3) and go over the car and thread lock anything that might come loose and cause a part to either fall off and get lost or fall off and cause you to lose control.
dont give up.
once it will kinda be like that forever actually.