stop. You are amazing. Your art is amazing. Yes, you may not be able to create full painted 3d realistic masterpeices. You'll get there.
Right now, you are doing great. Don't like your art? Maybe something bothers you, or your not satified? We all relate. What about the artists who's works you love? What about their style, their art, is it that you like so much? Do they have a specific way they draw heads? maybe they have really good anatomy, or excellant colors? try drawing like that for a bit, and shape it to your style. Reference from pictures, find good color palettes, discover new techniques.
just please stop saying 'this is horrible'. Now, I get that you may think it's horrible, or may not like it, which is perfectly normal, especially when you feel like you haven't reached your potential, or didn't mak what you saw in your head. but I think you did great, and you tried. if you didn't try, oh well, i still think you did a great job.
i'm a bit tired, so sorry if i'm rambling
basically what i'm trying to say is this: Instead of seeing all the things you hate about yourself/ your artwork, see all the ways you can improve. Look at what you dislike, and ask yourself 'how can I improve this? What do I need to do to get to a place where I'm satisfied, and like this?'