Ouch, thankfully auto shoulder straps are really rare here, I hate them! I am able to fasten my seat belt myself...
One thing I want to add... it's true, sometimes seat belts harm in accidents, but in a far higher number of cases it's one or two broken ribs with the seat belt and being dead without. I'd definitely prefer the broken ribs!
A friend of my parents was driving in Italy in an old R4 and the girl on the passenger seat didn't wear a seat belt, the driver did. The driver got out mostly unharmed, the girl was thrwon out through the windscreen and died after being in coma for several months.