How can I figure out if im better at being a artist or writer?

Based on others critiques of your work...?

Not sure, I mostly don't bother myself with those kinds of stuff, I just go for what I like better. If I like them equally then I spend time doing both of them

Only you can decide that ! When you are bored and have time to kill, what's the first thing that comes to mind ? Art or writing ? That's what you love.

Do samples of both, ask people to critique both. Whichever has the fewest critiques is the one you're better at.

Draw a picture then write a story about it