I think you played this wrong on every street. I think I would have folded everywhere especially against a loose / passive.

Secondly the only hand you are drawing against is a pocket pair or 22 and even then he could have you reverse dominated. e.g. 2-K, 2-5 that way you only split if you hit.

He more than likely has a 3 or an A or a pocket pair and you have nowhere near the odds to call considering you are drawing dead vs A/3.

Edit: didn't see gutshot. I think your outs aren't .5 each but gutshot is full value. I wouldn't call here. He is passive so more likely than not your outs aren't good. Also you have to think of reverse implied odds. How often do you hit a K/5 and he bets and you call and you win?

I think you only win if he checks to you and you check behind. 0 implied odds, some reverse implied odds.

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