AITA for not wanting my brother to drive my car?

context i am 24F with a 21M brother. I bought my car about two years ago and at the time my credit score was low so i was offered a pretty shitty monthly cost with a high interest rate that i am still paying + insurance. at the time, my brother told me he would pay half for the costs to lessen the burden and i believed him and accepted the offer. however, he has not paid a dime towards the car payment and says its not his obligation to pay half when all im really paying is just interest.

normally, i wouldn’t care but he drives MY car more than me. he keeps the keys. and getting the keys from him feels daunting and i have to basically ask permission to use my own car. whenever i tell him it’s my car and not his, he gets angry and says he’s the one who cleans the car and im the one that’s stupid and is paying interest for a car. getting the car keys from him and setting boundaries is always a struggle and ends up leading to a fight.

i have threatened to call the cops on him and report the car as stole but never acted on it. the title and registration of the car is all under my name. it just feels so unfair.