You can still diagnose the problem if you want. Do a range check. Grab a friend, or your dad. One of you takes the fuselage, and the other takes the radio. With the antenna down, walk away from each other. The guy with the radio works the sticks as if he were flying, and the guy with the plane watches it for random twitchiness. As soon as the plane starts to twitch, stop walking. You should be quite a ways away from each other, at least 50 feet.

I suspect that you may have damaged the control board in that crash, and the plane is not responding properly to your commands at range.