I don't think that was the deal-breaker. Sounds more like there had been a lot of small things, and thing about the car was just the last drop.
I haven't really figured out my deal-breakers yet, but I'm pretty sure that if a guy were to treat me with disrespect I would throw him out of my life pretty quickly. Oh, and men I don't know who ask for sandwiches, just because it's a ******** meme. I'm not your girlfriend, I don't know you, you're not paying me, why the hell would I give you a sandwich? Such a turn-off.
Last time I was in a relationship it ended because he was so much more in love with me than I was with him. That just made me feel crappy. (Combined with a hundred more tiny things)