Bad Limit Hold'em decisions

In my last live $20/$40 LHE session, I made the worst possible mistake that can be made in Limit Hold'em....twice in the same orbit. I'll list them both here because I need a reminder to stop being such a weak-tight-passive retard. My preflop decisions are debatable, but the substantially dominating factor in both hands is that the cost of seeing the showdown is well defined.

First I should try to define my mental state prior to these two hands. In the only 3 hands I had been involved in during the previous 30 minutes I missed a very good opportunity to bluff at a 4.5 big bet pot on the river in a 3 way hand (Hero was in 1st pos, pfr was on my left: protected pot) and was outdrawn twice in ~5BB pots by the Donk on my immediate right. My confidence level was somewhat deflated at the start of these hands, and significantly impacted after hand #1.

hand #1
8 seated $20/$40 LHE
Villain #1: very large preflop limping range, plays draws very aggressively on the flop, very often slow plays the flop with hands like a set even on coordinated boards
Villain #2: fairly aggressive postflop, but slows down in the face of extreme aggression even with hands as good as bottom set
- preflop: Hero limps UTG w AcJs, fold, fold, Villain #1 calls, Villain #2 calls in CO, button calls, SB completes, BB checks (6 players, 6 small bets)
- flop: 2c5cJd, blinds check, Hero bets, V#1 raises, V#2 3-bets, folded back to Hero, Hero calls, V#1 caps, both call. (3 players, 18 small bets)
- turn: 2c5cJd6s, Hero checks, V#1 bets, V#2 quickly calls, Hero calls (3 players, 12 big bets)
- river: 2c5cJd6s3d, Hero checks, V#1 bets, V#2 very reluctantly calls, Hero mucks (final pot 14 big bets) V#1 shows QJo, V#2 takes the pot with KJo

hand #2
9 seated $20/$40 LHE (4 hands after hand #1)
Villain #3: appears to be a LAG, but I have yet to seen him get too out of line
Villain #4: has a very large preflop calling range, but generally has a good sense of where he stands in the hand postflop. Capable of tricky plays, but may be on a mild case of tilt from a couple of bad beats
- preflop: fold, fold, V#3 raises, fold, big Donk calls in the hi-jack, Hero 3 bets in CO w AsJs, button and SB fold, V#4 calls in BB, V#3 and Donk just call. (4 players, 12.5 small bets)
- flop: 3c9dJd, check, V#3 bets, Donk folds, Hero raises, V#4 calls, V#3 calls (3 players, 18.5 small bets)
- turn:3c9dJd7s, V#4 bets (and has 0.75BB remaining), V#3 raises (both V#3 and Hero are very deep), Hero mucks, V#4 calls all in. (2 players, 12.5 big bets)
- river: 3c9dJd7s? (brick). V#4 shows QJo, V#3 mucks.

The first hand wouldn't have been so bad if I had mucked on the turn (although I'd still be pretty sick). The player on my left is taking the lead, so probably 80+% of the time I will only need to call 1 bet on the river closing the action to showdown in a big pot. Additionally, I've played enough with Villain #2 to know that he calls much faster on the river with any hand that beats me.

I honestly think that given the information available at the time it was possible to deduce that a very significant % of the time I am at worst chopping the pot with one or both Villains.

To make matters worse, I foolishly admitted to mucking the best hand, yet another -EV decision. A terrible, terrible metagame slip up.

The second hand is slightly less bad than the first, although still incredibly weak. I was too flustered to comprehend the reasoning of Villain #4's turn bet. My current thoughts are that he had a hand like JT and was conscious that he had less than 2 big bets remaining that were going to put in the pot no matter what, and he bet on the possibility that I raised the flop on a flush draw.
At any rate, it is very straightforward that I will be paying exactly 3 big bets to see the showdown on a 12.5+1=13.5 big bet pot. Given the uncertainty of Villain #2's range and the pot odds, this is a simple calldown.