LG G4 Trouble

I've been having problems with my LG G4 ever since I got it the day it was released. The touch screen tends to be unresponsive. Sometimes the phone goes to sleep and I can't wake it up. Poweramp has a tendency to pause and play music when I plug the auxiliary cord from my car into it. Other times Poweramp just stops playing. The case used to be that LG Voice Mate would interrupt the app to get me to agree to terms and conditions. After getting rid of it the same problem started happening with the Google Now app so I had to disable that. When those two apps were gone the problem with Poweramp persisted. It continuously pauses and plays on its own and sometimes music ends up playing through the speaker of the phone itself. I've contemplated going to the local AT&T store to see if I could use the Next plan to get another phone or if it would be worth it to see if the problem with this phone can be fixed.

So basically I'm here hoping to see if anyone has any suggestions. Thanks.