Speaking as somebody with a fuller bosom, as you mentioned, the problem is mostly the angle of the shoulder belt. There is an adjustable slide, but it only adjusts four or five inches, which simply isn't enough for the seven inches difference between my partner and I. The end of the belt is by my ear, not my shoulder. I'm constantly tugging the shoulder belt lower when I'm in the car, either passenger or driver, which is really not safe.

In 2018, I was in a car crash. I was driving a 1998 minivan and got t-boned by a 2006 SUV going 55mph. It turned the van into a banana, pushed the driver's seat over to the center. I don't remember the accident itself, but it looks like my head bounced between the B pillar and the airbag/steering wheel, it broke my glasses, cracked my skull, and gave me a subarachnoid brain hemorrhage with a 50/50 survival rate. Literally knocked me cross-eyed, so I was seeing double for forever. It also broke my pelvis into 8 pieces, sliced up my spleen, and broke a few ribs. I still have a bolt holding my pelvis to my spine. Took over a year to recover, then COVID hit while I was trying to get back to work. fml, never doing that again.

Maybe it would have been better if I had side curtain airbags, but the main problem really feels like the seatbelt just doesn't fit.