PLO10 - Multiway 3bet pot OOP vs loose fun players.

So, on this hand MP is a 80/50 preflop maniac, btn was a 95/10 on 41hands, who folded to cbets 13 out of 16 times so far, so he was basically always seeing the flop and folding unimproved. BB seems loose passive, 67/20 on only 15hands.
So I thought I had a 3bet for value with a hand that will usually flop better draws than theirs on spots that we both hit, and that I could win some board textures with a 1/2 pot cbet when I miss. I wasnt expecting BB to come along.

So when we get to the flop I have a toppair with 3outs to top2 and ef SPR is 1,7. I think that once I bet here I cant fold anymore, also I'm not sure if I can x/f against their ranges cause they might call with weakdraws like midpair+gutter or oesd or bottom two that we have good eq against and etc. And I think that we are only crushed vs sets that are unlikely but pretty possible, I think they play every pocketpair on their ranges just to setmine, and maybe we are also screwd agains stuff like 876* or 8765, 9876, I'm not sure, would need to run some equilab.

So, am I overplaying hands OOP ?

Do I happen to hit like worst case cenerio regarding their ranges and how they hit the flop ( agains these specific hands preflop I had 40% vs MP25% and BTN 35% and at the flop I had 27% agains MP 33% and BTN 40%) ?

Since I'm against loose fun players and not tight regs, how do you construct your 3bet range to exploit them the most, both IP and OOP, and you dont mind about variance ?
Cause I'm pretty sure we should 3bet a lot if they are open and than calling 3bets with 80% and 95% of their ranges, and also cause when they hit they constantly gamble (or maybe just dont understand ev) and go all in light with stuf like TP+gutter on flops that hits really well heros range like J97, T74, Q85 and etc. On the other hand I might be doing OOP what I should be doing IP, dont know.

And as played preflop, being aware of effective SPR and having the info we have on our opponents, we put all the money on the flop, right ?

What are your thoughts ?

IPoker, $0.05/$0.10 Pot Limit Omaha Cash, 6 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

Hero (SB): $19.72 (197.2 bb)
BB: $10 (100 bb)
UTG: $13.88 (138.8 bb)
MP: $4.31 (43.1 bb)
CO: $10.56 (105.6 bb)
BTN: $12.62 (126.2 bb)

Preflop: Hero is SB with 9 J T 7
UTG folds, MP raises to $0.35, CO folds, BTN calls $0.35, Hero raises to $1.50, BB calls $1.40, MP calls $1.15, BTN calls $1.15

Flop: ($6) 5 4 9 (4 players)
Hero bets $4.20, BB folds, MP calls $2.81, BTN raises to $11.12 and is all-in, Hero calls $6.92

Turn: ($31.05) J (3 players, 1 is all-in)
River: ($31.05) K (3 players, 1 is all-in)

Results: