Bike sounds crunchy while pedaling

[soundscrunchy]

Can anyone please help me identify how to stop my bike from sounding crunchy when I pedal? It only makes this sound while pedaling and not while the bike is just being powered by the motor. I'm very much an amateur at bike mechanics and have tried adjusting everything that turned without success. Around 2500 miles if that's relevant.

 

[Bobk]

Assuming that you have adjusted the derailleur, it sounds like either a bent derailleur hanger or a defective freewheel. Grab the large cog on the freewheel and check it for free play when you rock it from side to side. There should be none or very little play. If the derailleur hanger is bent, replace it.

[inoxa]

yes sounds like alignment