both players unknown

First decision point I'm not 100% sure about. Cold 4betting vs two complete unknowns doesn't seem great but I don't think I can profitably call in these positions and folding seems a bit too tight. That's why in the end I decided to turn this into a bluff preflop.

I thought a second about range-cbetting small here which might be the theory-optimal play but then figured this guy either has Kx+ and is not going to fold no matter what, an underpair which I can easily get to fold later on and basically hardly any bluffs I might make an incorrect x/f against.

Since I have pretty much the best blockers (AK, QQ, KQs) I decided to 2barrel bluff from this point on. I have all KK and maybe even some more combinations of AA, AK in my range which I'd check for the same exploitative reasons OTF.

...but in the end chickend out on this card which seems pretty much like the nut-worst card in the deck. Do you like this at all or would you have played it differently?