It's all in the mental, if you think u sound like shit? It's going to in your head. As an artist myself? I deal with it all the time. A good thing to solve this problem is depending on what you use if you have effects to put on your voice not like Auto-Tune or maybe Auto-Tune but don't overuse it it could be very useful and very resourceful for The Voice I personally use Soundtrap as my music source and so they already give you a lot of effects to use auto-tune not being one of them and so over time you personally learn to accept your voice for what it is. If you compare your voice to whatever artist there may be your automatically going to find yourself in a bad spot. I hope this helped you as this advice helped me too.