Well that's how you can improve then. If you have talent at art (and I wish I did), then incorporate that into your games!
I always think game developing requires such a huge set of creative and technical skills, so I'd advise that you play to your strengths. Like, if you're good at art, base your games around that and come up with some cool sprites, backgrounds, thumbnails etc.
You've started a thread asking for comments of your games, so you can get better- which is what we all want to do. From your comments, I think you're very aware of your strengths and weaknesses as a dev, though- you don't need other people to confirm these.
I'd suggest just keep working on your games, and put out the games you'd like to play. I find most devs are their own harshest critics. Just do the best you can and try to see things from the point of view of someone who's just logged into itch.io. Will they want to play your game? And if not, why not?