After 40 years of shooting stick bows, it still happens to me. Back when I worked for a living, I'd kid myself that it was no good to shoot when I was unhappy with the wife, the boss, miserable airline travel pressures, job stresses, whatever. But, I was out of town a lot and could only shoot a few days a week, so came to feel that there was also benefit to shooting when I didn't much feel like I wanted to: shooting my bow is my own special type of relaxation and -dammit- it makes me feel better, even when I KNOW I may not be building better form!!! (this ain't the freakin' olympics!) I found it was possible to return from a shooting session with a hell of a lot better attitude, even if I hadn't built better shooting skills!
It's a lot harder to buckle down and shoot well when you are having a bad day. A lot of days I don't succeed. But, I shoot anyway. And, after a few decades of this, and losing a few friends who loved it as much as I do....I'm thankful for every day I can shoot my bow and arrow! There are things in life that are more important - but, so long as I don't have to choose between them- I'm going to continue to do my best to get my bow-and-arrow therapy every day I can!
Sorry, I got carried away there. The original point was: there should be no bad times doing something you love. Take the good you can from every chance you have. But, don't ever quit. Long term, you're better for all the experiences. Go out to shoot with a positive attitude.