Another one is while you remain the same the human race evolves around you so in a million years you won't look like what's considered standard for humans. You'll either be a freak, a monster, or an experiment.

I get what you mean but Perfect Kars has literally no escape, frozen in space. Inside a crevasse and with immortality, you could create gaps in the rock with your bare hands over time and use them as footing. Would it take you years ? Yes. Would you get out eventually ? Also yes.