Personally, I find it endlessly frustrating and even terrifying to be in the passenger seat with a driver who jumps in the car and immediately goes… Then worries about Seatbelts/Radio/AC/Mirrors/Plugging in Phone/etc etc while driving.
My husband regularly continues accelerating toward the vehicle in front of us while said vehicle is braking. He also tailgates. It’s terrifying and I rarely let him be the one to drive.
Granted I’m a lifelong loner but…how do you deal with this? I don’t know for sure, but I don’t think I could ever have a partner who drives so egregiously dangerous. Not only is it dangerous, but it also indicates a severe lack of empathy for other human beings. I don’t know how I could reconcile a severe lack of empathy in a partner like that.
I guess it depends. Does he tailgate out of aggression or because he’s not paying attention? Not that one is necessarily better than others, but the intent is different. One just implies stupidity while the other implies lack of empathy.
The last time I was a passenger in my brother’s car, I remembered that he tends to drive in a way that makes me feel unsafe, like what OP described. Unreasonable acceleration, tailgating, swerving. He laughed when I was physically bracing myself and said his partner does the same thing. I told him I just won’t be in a car when he’s driving anymore. Of course, it’s easier to do because I don’t see him too often.
IMO when I’m driving, I not only have a responsibility to keep my passengers safe, but to make them feel safe. I might feel safe because I know I’ll brake in time, but my passengers don’t because they’re not controlling the vehicle.