These situations are very expensive and can hurt your winrate severely, to the point of making you a breakeven player.

It seems you have a mental game problem, at least in big pots like these, the way to correct that, in my opinion, is having a strong decision making process, analyze objective data and don't get lost on small, irrelevant assumptions like your Jc blocker.

Going to the hand:

• Don't 3-bet preflop, just fold.
• CB the flop for a small size with your whole range. Gets everything easier.

As played:

• You are facing a turn overbet, that's a very strong line.
• You have a weak bluffcatcher, his value range crushes you.
• You have a weak flushdraw, that is dominated by your opponent's AcX, so it doesn't add much to your equity.
• You should have a protected range on the turn, with better hands to call like AA,AK, some nut flushes, maybe KK, it depends on how you play your range, so you're not folding that much, so you can fold weak bluffcatchers without being exploited.
• On my experience, this line can be a strong but vulnerable hand shoving for value/protection knowing that you have a lot of AK on your range that you're going to call, that value/protection range (sets, 2pr, weak flush) is way ahead of your hand. If he's bluffing he is going to do it with a decent-equity semibluff like AcJx. If he wants to bluff 65s do you think he'd overbet knowing that your range is AK-heavy?

I don't see any reasons to call, every point that I made lean to a snap fold. To have a +EV call here, you need super strong evidence that villian is overbetting with a lot of random bluffs, and that's not the case.

Yes it is terrible for your winrate. Just one 20bb mistake per 400 hands decreases your winrate with 5bb/100. I think you will like this video if you have a membership:

http://www.runitonce.com/poker-training/videos/30-second-exercise-2/

If you xc this otf that means you also xc AK and some other now strong holdings so you will have stronger hands

you have to accept that you will make mistakes and realize that these are helping you grow and improve your skill set. The only mistake that you can make is not learning from your mistakes.

It definitely sounds like a mental game problem. That and you probably don't know your ranges well enough on that board. There are a few things I would suggest:

1) Take this mistake as a learning opportunity. You obviously don't know the spot well enough because you blanked mid hand, so do some card runner ev or pio work on it

2) Keep observing these moments that you become tilted. They will let you know where your weak point in your mental game are. The real mistake is letting this lead to a mistake in the next hand. It's normal to feel frustrated in these situations, but you can respond by making more mistakes or learning that mistakes are just part of the learning process

Forget the flop, turn,and river. If you have tilt then document it. Express your feelings on paper or recording rather than telling someone. Find out what's causing your tilt, be conscious of it, and realize you can't control the cards that comes, you can only control how you play them. If you don't learn to let it go it will manifest itself your next session, only more quickly. If there were no variance no one would play -- especially bad players, because they would always lose. Variance is what keeps poker from becoming chess/checkers.

Tilt loses you mucho dinero.