Your raise on 4th is what got my attention. I don't see the value in it. If everyone is a loose caller, what were you trying to achieve here? I understand mixing your play, but you're facing 1 over card and two possible str and/or flush draws. Agreed spades are scarce with 6 known out, but there are still 7 to catch and make. I might even fold here.

5th street is an easy laydown to me. Seat 2 makes his flush and Seat 5 pairs up when you hit a brick. Release this puppy.

JMO - Knoll