5/10NL: Three trouble hands from recent session

[Eihli]

God I want to [censored] quit poker. I can't [censored] get it in my head. Why are hand 1 and 2 correct? Why do you checkraise that flop instead of betting out? Why don't you bet on that draw heavy board? If he raises, good, go all-in. There are so many cards that can come on the turn that will put you in a tough spot and give him an easy way to semi-bluff you off the best hand.

I'm not even [censored] running bad. This is worse than running bad. I can't see what the correct play is. I've run bad, it doesn't bother me. But now it seems there are so many situations like these that I just don't know how to [censored] play and it's more frustrating than any string of bad beats.