[downtown]

I think you're getting mixed up with the big stack with a marginal holding. You need to think about why you are raising the big stack and why it's a bad idea with this holding. What's your plan if he reraises you all in? (If it were me, I would potentially do this with air.)

Moving on to the flop action, you need to shut down when your flop bet is called. That call along with the preflop call should scare you. If the big stack can try to move you off your hand with no problem, why isn't he?

Obviously it's also bad luck here, and maybe he would have played the K5 the same way, but in the long run be more cautious when mixing it up with the only bigger stack on the bubble.

P.S. It sucks to have that big stack on your left, I know. It happened to me yesterday 32450982034958109 times.