Re: hero runs bad...freezes and forgets how to play cards??!!
I would fold this.
UTG opens 3xBB and knows he is committed if anyone calls - further he doesn't push with M=5 but raises.
I think you have no FE if you shove and well be a underdog most of the times. Stack sizes are too low here to play this one postflop, so I'd just muck it preflop.
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