Welcome to Android Central! When you say you wiped it twice, do you mean a factory data reset? If so, then I would suspect that some app you installed is causing the instability. Try booting into Safe Mode, which temporarily disables all 3rd party apps. If the crashes stop, then something you installed is the culprit--the trick is figuring out which one. You may have to uninstall apps one by one (or start from scratch and reinstall apps one by one). If the crashes persist in Safe Mode, then there's something wrong with the system itself.