hero had been making some hands/ running good so appeared to be LAG but was actually playing pretty solid minus a light three bet turning to gin hand.

Villain was playing a loose passive style calling alot and making small bets and min raises w/ value hands. one hand had of notice come up earlier where he checked behind bottom end of a str8 on 4 to a str8 board w/ no flush or FH possible in a heads up pot missing possible value from a set.

H opens CO w/ A10dd to 10 with 400 behind
V flats button about 150,

flop 678cdd
hero checks with intention to check raise call of for 75bb
V checks behind
(should i have just c-bet?)

Turn 4c
hero leads for 15 into 18 after rake
V min clicks it to 30
hero flats
(should i have just shipped it?)

river 4h board 6c7d8d4c4h
hero checks
villain over bets pot for 90 bucks leaving himself like 20 behind

First instinct is obviously snap fold, he can easily have a 5 cuz he plays all kinds of hands especially form button. missed my 12 outer oh well. blah but this is hand where he checked behind dummy end of the str8 seamed like he wasnt willing to value w/out the real McCoy nuts. even tho i cant really have a boat playing this way post flop i kinda expected him to just check behind all two pairs maybe even a 5 and only bet with like 910 or a boat maybe that 5. ever considering an obnoxiously light hero call in this spot? just seamed so bizarre that he'd choose this sizing if he wanted a call when i kinda cant have anything. i mean i already butchered the hand so i might as well throw the money i saved from missing and not betting my draw right? jk but i was stumped that he'd choose this sizing here after making so many min clicks and less than half pot bets for value during the session.

Any thoughts on why or why not to call and maybe how i coulda avoided this silly spot all together?

Could also be the nuts realizing that it isn't getting paid.

Possibly boated up hoping you somehow have a straight. Etc.

Just fold it.

I like b/3-b way better than c/r OTF.

Turn bet is OK with a ton of equity. His min-raise screams value. 2p+, imo. Shipping it here is aweful, as you have little FE and are way behind when called. Call with good IOs looking for NF to beat his straight/set/2-pair.

River is a turbo fold. LP's raise turn and bomb river with air on this kind of board after checking back flop like never.

the nuts as in 44? i can see some players leveling me into a light call here with a big bet but i just dont see him min raising me with 4 to a str8 on board with bottom set on the turn. def possible and probably likely from some more agrresive players after i check the flop representing that im already in get to cheap show down mode or just giving up. i was really considering this call and think i mightve if i had like AK..

Good thing you didn't have AK then. You'd have burned a stack for no reason. Top-2 minimum to call here when you know he can never be bluffing a whiffed NFD (i.e. you have Ad, or saw it exposed), imo.

Nuts= AJ.

Grunch,
Checking OTF is a mistake verse this player profile. Why would you think a loose passive Villain who plays smallball is going to bet the flop anyhow? You need to fire out OTF with a semi-bluff bet sized to get folds. As long as you fold the river I am ok with the rest of your line.

Bet out on the flop when you have maximum equity. You're getting pot odds to call the turn, so easy call. Fold on the river, he has a big hand with the cib raise on the turn.

I feel like over betting the pot at this level is almost never a bluff.

So to answer your question, hell no.

You should basically not have a x/r range vs a villain described as passive. I only really ever x/r passive villains with value hands and monster draws, after they show strong initiative. (or with janky draws if I think they aren't that sticky).

Fold river dude.

Long story short I fold guy shows me J9 of clubs for a missed draw. Not to upset to fold such a marginal winner since im literally beating nothing (not even some bluffs)but i feel like that sizing tell and his tendency to check behind big hands on the river was something i should have acted on.

I think you're giving a loose passive 1/2 Villain more credit than is warranted. The vast majority of the time, he has something that he interprets as effectively the nuts. Sucks that he had one of the few possible huge combo draws (he checks a pair back otr, and we block a lot of the diamond combos) and decided to get bluffy with it. In general, this is the wrong type of Villain to make Hero calls against.

As other have said, lead flop against this Villain. He's checking back way too often. We want it to be possible to get stacks in if we hit any of our gin cards, and he has a lot of dead equity in his range (hands like QJ, K4, etc.), to which we don't want to give a free card.

How did he play the flop and turn in the straight hand? Given how he played that, the only possible value hand he should have OTR here is 44, and does he even min raise that on the turn with 4 to a straight out there?

I actually don't think you're crazy for thinking about calling here given what we know about the villain. Most LLSNL players are extremely polarized when they make big river bets, and given the straight hand it doesn't seem like he can have anything for value here (assuming he's not smart enough to adjust based on the straight hand).