This hand functions better as an iso than an overlimp in my opinion. As played, easy fold against this sizing it's not close.

Vs such a huge jam on river I would never call with less than flush unless I had read he was massive bluffing whale

Raise pre.
We won't have a good playability with KQo vs two villains.
As played, seems fine.

I see some more spewy players make this play really trying to sell a bluff (maybe not so common in full ring?), but when both the open ended straight and flush draw gets there it's just an easy fold.

you're risking too much to call this imo.. If he 2xpots it you might give it a call but in general I don't think people overbluff enough as a bluff nearly enough to call it (personal thoughts).

I agree with isoing>limping behind, but as played I think you definitely have to bet flop. It's mw so you should play more straight forward and defend your equity and this one is a clear Vbet. Your hand is very underrepped as well and CO probably only bets when ahead of your TP and x back when he's not. (maybe some thin vbets with TT+ but that's 3hands, 1 we block)

OTT vs his small sizing I was thinking to raise at first but vs an agressive player you might earn some big bets from him OTR so call might be fine. He might disguise his JT with this small sizing but I'd think usually he doesn't with 2people behind on this board.