There's some good advice ITT already. However, I'd suggest that the problem is less of a strategic one (since you already know you're making mistakes) and more of a mental one.

Quite simply, you're on tilt. Each time you call a river bet, you do so because the last time you did it you were wrong, and you think that if you're right when you do it this time, that'll finally give you the sensation of triumph that you're looking for. In essence, what your brain is doing is not actually looking to make the right decision, but looking to make the decision that is most likely to give you the feeling of being a hero. It's the same principle as the one that leads people to shove preflop in marginal spots – they feel bad, so they seek out a spot where they either continue feeling bad because they busted, or they double up and have a reason to feel better.

I would say work on developing the confidence to know that you don't need to be making hero calls in order to know that you're good at poker. Derive pleasure and confidence from your ability to fold the best hand. Become the kind of guy who takes a twisted pleasure in losing a big portion of his stack during a hand, but still having the discipline to fold the river and work on building it up again. Instead, what you're doing right now is allowing all of your past decisions on the river – wrong or right – to influence your next one, because you're just looking to make that one herocall that will make you feel better and erase all your previous mistakes. That's a mindset you can't afford to stick with.