I'm glad it's helpful and maybe you could go to the OSHA tipline if there's anything egregiously unsafe that you feel would harm you immediately. Unfortunately with cumulative trauma companies often just let the injuries happen and then pay for them. The smart ones don't because the fixes are cheaper than the payouts and lost labor ability but.... Not many are smart.
Yeah, 35lbs shouldn't be too bad if you pick it up the right way (half-bend in between your kinda "lunged" legs instead of 100% back or 100% knees).
Lifting your bodyweight is pretty not good. Usually bodyweight is at least 70% of your ultimate strength. I fight in mma so i weightlift for it and my body weight is about 50% of my ultstr (deadlift is a good measure, not exact but pretty good).
And shit. Lifting over your head and going up stairs AND having bodyweight lifts? Wow. You should be doing those max 10-20 times a day. And I'm sure you didn't. Where did you work like a moving company that carried couches and such?
Yeah, suicides and heart attacks(/other shit random deaths) are unfortunate parts of working at a large company where you meet a lot of people.
but...
People getting maimed or killed by trailers hitting them EVERY YEAR!?!? Are you exaggerating for effect or are you being serious? Do you have a date for one of them and the company so i can go on the osha.gov incident report page and look up the frequency and type of deaths that occured?
A death is a huge thing. OSHA inspectors almost always arrive within weeks and you get hit with hundred-K to Mil fines, plus a lawsuit from the family of the deceased, plus lost production from the area being shut down, plus morale hit to your other employees for OBVIOUS reasons....
About 15 miles from my gradschool last year a death occurred at a korean auto manufacturing supplier (arjn or anjn or something you could google it I'm sure) It made all the newspapers, they got like 2.2m in fines and plus the family suit is in progress.
Are you still in the dangerous job? Or have you been able to find a different one? I'm guessing the pay was so good that's why you stayed even though it was rough... My advice to you 5 years ago before you started would have been try to gain as much weight as possible before beginning and maintain it, and also work out lightly at least every day, even if only for 15-30min.