Don't think I'm supposed to fold a pocket pair this deep, especially when villain might go bananas and overplay something.

However, I'm pretty lost regarding how I'm supposed to play this runout, especially when villain is plainly doing some super unorthodox stuff.

It's perhaps worth noting that, at the time of this hand, their river agg% was significantly lower than their preflop through turn aggression.

I don't know that I can justify superhero calling the river, but is the only line I can take here the one above with a check/fold on the river?

(Looking now at GTO+, I guess I might actually be folding the flop? It makes some sense: there are just so few good runouts and villain can apply a ton of pressure, as they did.)