What's wrong with my singing voice?

You were off key most of the song, i do see potential with your tone, it does sound kinda soulful. But you have to get the mechanics of pitch and staying on key, and holding the notes at the appropriate length instead of just chopping up the notes. I'm not saying you will be never a great singer, but that was not good at all, just work at it with a one on one teacher, should cost about 20 bucks for 30 minutes, go once a week, and progress as a singer

Well you can't ever be incapable of singing, you were not born with the talent, you develop it. And you need to work on the vocal range, and vocal accuracy so you could easily move from one note to the other and placing them correctly. And you can get better, but if you're still in the beginning and intermediate levels, I would not suggest hitting high notes (or it will harm your voice) until you could get the regular cords correctly, and you feel confident enough to do it. Best of luck !!!

Lots of people who sing for a hobby have singing lessons. Lots of people who play golf for a hobby have golf lessons.

Your choir teacher should sort out any difficulties that you have.