Comparing a Pope today to a Pope from 500 years ago is kind of like comparing quarterbacks from different eras. A 3,000-yard passer was considered prolific in 1975...today, it's shit. There are different standards for human indecency.
As 14XX goes, raping and torturing and selling the papacy was pretty ****ing bad, but you could get away with it.
You couldn't get away with that today...but you can get away with a massive coverup of child abuse...no problem.