I feel like a donkey

[ArmenH]

Live 2/5NL game at MGM in Vegas. I have 500 behind, villain has 2200 behind. He has been luckboxing all night and he is easily the worst player at the table. I post in the highjack 3 limpers i have KhKc I check my option, cut off calls 5 and button limps for 5. Villain pops it up to 15 from the SB limpers call 15 I repop to 115 folded to SB he calls the rest fold. Flop is 9h5c2h. He waits 3 seconds and says all -in. Is this ever a fold? I have 385 left. His range is all over the place. I strongly felt he had a combo draw, even against a hand like 8h7h should I be folding this? Thoughts please.