SB and BB hands in 8/16 w/ 1/2 kill

I find some of the more nuanced situations in my LO8 game happen during raised hands, or kill pots when I am in the blinds. For ex.

1/2 kill is on
H (BB): w/ KT85hhh
multiple limpers for $12
H calls $12
MP checks option
5 way action

Flop: AhTs6d
Checked to a mid position bet, everyone called (against 3 unknown players ~18%)

Turn: 5h
Checked to a mid position bet, everyone called (against 3 unknown players ~23%, against one lock low ~23%, against better tp ~12%)

River: 6h
Check, call

Obviously Im not folding after seeing turn, but I have noticed (it may very well be confirmation bias), but some of the largest pots won or chopped in this particular game are multiway backdoor situations where middle pair and bdfd/bdsd end up catching up on the river.

I know the preflop call for $4 is probably not optimal, but the flop call should be 80/20 with this many people? Just wondering should I be floating more or less with hands like this or better, such as gutshot w/ bdfd, I have been playing more snug and folding those hands generally.

Appreciate any discussion.