Fine, so I'm no good

It's not a bad thing to admit the truth to yourself. Never. If you are not a good artist, just tell yourself that and move on - practice and paint some more. I have only sold three small items in my life, although I have painted over 400 works. My stuff is simply not that good. Period. Am I an unappreciated painter? Nope. I'm just not good. That's all. Period. End of discussion.