There is no ‘better’. There’s just ‘different.
That artist you admire is different from you, not better. They draw differently, not better.
They’re at a different place in their life, and have struggled the same as you are now struggling.
Work on improving the way you create art, but don’t put yourself down - you are good. You’re great. You already make great art and you’re just going to continue making great art.
The key is to keep doing it, over and over, even when everything you draw is awful and you end up with a huge pile of crumpled up pages on your floor….
Better solution: take pictures of your cat chewing on the torn pages it makes you feel better:
Keep doing it. Keep creating.