Some More wisdom from The Poker Mindset:

"Just because you are making money doesn’t mean you are playing good and just because you are losing money doesn’t necessarily mean you’re playing bad."

It also talks about differenciating between goal setting and monetary goal setting. And i think part of the problem is that when i sit down to play, i have a general sense that i should win money instead of just play each hand correctly. And if i don't finish in profit i've done something wrong.

another great quote:

“You only have the power to significantly affect your results in the long term.”