I like the flop bet and at this limit (where everyone cold calls with crap) and would bet big if they hit the turn I'd still bet the turn anyway building a bigger pot. At higher levels then no chance but here they are all going to call.
You dont have to agree with thi but its obviously a luxury you get at this limit/type of game at this limit.
My problem is that u want to be hlding higher connectors if the whole of this table sucks/loose/is fishy. You were taken by kxs and Axs which is likely considering the numbers in the pot. I think while 76s is a good hand in this scenario you have to consider its worth when u know opps could hold any high card suited (Axs/Kxs/Qxs) even out of position
Ill leave the others to discuss betting the turn but i think hand selection here is important