This is that BS mentality where your barometer of adversity is the gold standard. It's not. Just because you went through much worse, does not mean today's residents deserve anything near that. You didn't deserve it and neither do we. It's not a rite of passage.
It is exploitation of a group in a vulnerable position, because if they don't fall in line, they are screwed. The landscape of medicine is far different now. There isn't the extremely lucrative career awaiting residents that there was when you were around. Perhaps if that were still around, it would be easier to look past how residents are treated.
How on earth you don't frame it as clear exploitation of labor -and focus on that- is beyond me. Instead, you choose to focus having no pity for lazy and complainy people less mature and younger than you are (shocking they're like that- must be a totally unique generational sentiment). As has been the case for all of eternity, peoples' worst moments are what they react the most severely too- whether that's working 70 hours a week or 120, it might look the same for the same person, because it's still their "worst ever" week.
Look at the pay of midlevels, their light workload, and their hours. Hospitals can afford to pay residents much more. The hospitals are more the issue.