Preflop: IMO this is very borderline. In a loose PLO ring game you want hands that can make the nuts. You can fudge a little if you're last to act, so I'd probably jump in with your hand if I had a read that the button was folding, but without that read I'm folding K883 suited. After the raise, I'd call.
Flop: As played, I'd call.
Turn: I'd bet. If someone made the straight they probably would have bet. If there's a chance the flop bettor would limp in with KKxx, I'd bet about the same amount as was bet on the flop. If the flop bettor raises his big pairs, I'd bet more.
River: As played, the bet is good. After the raise I'd call. Given the way the 1st 2 streets were played it's unlikely the raiser has KKxx. You're basically left with fives full, quads, an overaggressive flush, or a bluff. I'd fold against a rock, but it doesn't seem like that's the case here.
Post hand: "
I go play some electronic craps" This is a clear mistake
Also, if you're uncomfortable playing middle set, play tighter preflop.
Just my opinion...