With a hand like KJo OTB vs CO I'd rather 3-bet or fold. We don't have the initiative, can get squeezed by the blinds, and when we go multi-way we pretty much have to play fit-or-fold. Vs MP/UTG I'm just mucking it and moving on. It's not bad to just fold here, especially since you can just move on to the next hand in Zoom. I don't think just flatting here is going to be profitable, and in order to show a profit from 3-betting is probably going to require good hand reading and being able to barrel off with air at times, something I'm not comfortable with haha.
Vs that ridiculous turn raise though I'm folding. Looks like he's hoping you have a Jack. He also potted the flop 3-way, which is pretty strong. And the. When he check-raises turn as PFR, that's just super strong. I don't expect a bluff to check-raise like this, especially from a deep-stacker. Only one time has a deep stacker (220bb) barrel off into me his whole stack. It just looks like he's trying to set up a river shove with his full house, given how deep we are. He might be doing this with AJ, but he should realize that's a little too thin/overreps his hand for 200bb, and probably 3-barrel that instead.