I think that here I am fold of UTG has all in these small blinds can show a really strong hand, risking half his stack, literally nothing. Many players bought in this hand I think here you fold and you can always find a good hand and situation to risk so much of his stack.
I would fold because there are three people that already went all-in before me. In addition, A, anything can beat Q,Ks so saying that if three people go all-in before me I would expect atleast one of them to have an A.
Four allins with yours are very dangerous. I don't know your style ,but according to mine this is a clear fold. Additionally you had only high connecting cards in your hand and not premium ones.
71% chance of not hitting on the flop. Why would you risk 1/2 your stack against 4 other people? You had no chance of pushing anyone out of the hand after the flop because people are already all in.
You should have folded it against the first all in raiser unless you knew something about him that would have made you called, but after the second and third, you had no business being in the hand unless you are just gambling.
I would fold in this situation.
Against so many all-in's it's very hard to improve Your hand. Most likely other players may also hold Q or K.
It's more common to get something good with small cards like winner did. It's strange but it seems to be so.