It takes years of endless grinding to level up your art to at least an 8/10. But as difficult as a pill it is to swallow... Sometimes, you just don't cut it and it's time to do something else.
There's the mental and physical limitations that exist that I don't fully understand.
Not everyone can be an Olympic athlete just because you play a certain sport for a hobby.
Same thing with art.
I remember trying to get into an animation program back in the day. Trying so much only to fail. So gave up that pipe dream and did something else. Because they wanted 8/10 art skill at least which looks like this for example...

Fast forward today, I'm making the same money as an animator doing welding/sandblasting.
Don't be discouraged.