Many people state a 22 is most deadly for that simple fact, it often has the power to enter, but not to leave, so it richochets inside of a skull or ribcage causing more damage than immediately exiting

This is a myth and one made up by people who don't know how firearms work. A 22lr is not going to do more damage to someone than a large caliber round... otherwise we'd be using 22lr to fight wars.

It's why it's not legal to kill anything but small game with it as well. Because it's inhumane to try and kill anything bigger than a squirrel with a 22lr.

A 22 is a dangerous weapon that can definitely kill somebody and needs to treated according to The Rules just like any other firearm.

What you said about bouncing around inside skeletal structures has no basis in reality, though. I'm a non-gun-nut American with some firearm experience, but my supposed knowledge doesn't matter in a world where you can watch 100 different youtube channels dedicated to shooting a variety of objects with a variety of calibers.

You might be thinking in the right direction, though, about situations where a bullet does more damage when NOT passing all the way through because it has dumped all its energy into the target along with expanding/fragmenting. Consider what happens when one of those youtubers shoots through water. Usually the smaller handguns like 22 or 9mm get decent penetration while high-powered rifles with multiple times the kinetic energy and momentum fall short of those. But because of the rapid energy dump you get other effects like a high splash.