It can't be wrong to have a jamming range which includes the nut flush and some nfds here. I don't know if it is the best possible play but it's certainly an okay one.

I think the call preflop is very bad because You'll be behind very often and you are too much exposed. Even a flop like A94 doesn't mean you're winning often enough.
The flop is standard.

He had 99 btw, no spades.

• now i remember this whole Preflop situation, i raised to check if he reraises hands like JJ+ or AK. I was pretty sure that he had PP there after calling.

I think the way you played the hand against several opponents on the flop you have 0% FE after you jam the flop.
Would anyone with two Spades just shove on the flop. It's easy for opponents to put you on a hand something like Ax A of spades etc.
Villians could maybe fold K8, A8 or something but I doubt anyone who would call your shove has a worser hand then you. You are basically hoping that KspadesX is going to call you.
It's a gamble shove

I'd rather think checking behind is the optimum play and calling a bet on the flop or turn in relation to the pot with how many outs you have is the way to go

I had 1.5x pot left behind so i thought its last spot to get anyone fold. I dont agree with that i didnt have FE, i could be holding a set, flush, overpair.

Calling pre is like burning money, you could potentially 4b but folding is also fine. There are definitly better hands to cold4 regarding playability etc.

I agree that, it was bad call. Bigger problem is still post flop play on that situation, it happened me a lot and i seem to struggle with decision