I don't want to lend my brother my car
Why won't you lend him your car?
It's because he smashed my car last month for no reason.
I agree that destroying your car is the limit why he shouldn't have your car anymore. I would recommend you tell him calmly why you can't let him borrow it anymore, and urge him to get his own car or at least get a rental.
I don't want him to think that I'm a jerk no, he always thinks he is right all the time.
That's why a little bit of an explanation is necessary. You have the right to decline assistance this time, but you are brothers, so you still want to support each other moving forward.