I'm not into the flop c/r. This is such a draw-heavy board, that without a read to indicate at least moderately aggressive opponents, I simply can't risk the free card. Bottom two-pair here is good, but vulnerable to the flush, a pair of kings improving to kings up or trips, and gutshot SDs. We can't protect against the flush, but a bet protects against the latter two. Without knowing who will bet, we don't know what a raise (or our flop action generally) will accomplish. As the flop played out, you haven't protected against anything, which was your stated goal.

Turn is fine.

River is the other interesting street. BB's bet certainly was odd, and even though UTG called, I like the overcall here to close the action. Definitely a good enough chance that you're still ahead.