Bad at art
You’re no more “bad at art” than you are “bad” at thinking.
Perhaps you don’t have certain skills. You can acknowledge that if you want.
If you feel the need to say, “I cannot make drawings that look like photographs,” you can say that. If you want.
If you feel the need to say, “I do not know how to use watercolors,” go for it. If you want.
But what you really mean is that you haven’t learned how to use certain tools. Or that you haven’t discovered how to put to canvas what you see with your eyes. Or to music what you hear in your head.
What’s possible, too, is that you haven’t created enough bad work to figure out how to make good work.
If you’re inclined to be creative, go be creative. Be curious. Make something. Create something. Get out of your own way and try something that might not work. Learn, and do it again.
But don’t say you’re bad at art.