It is 100% normal to feel sad, unsatisfied or angry at something that doesn't goes as planned. I also have those feelings at least twice a week and people will probably say something like "Look on the bright sight!". Well I used to think that quote is nothing but words because most of the time there is no bright side.
I have been thinking and finally know that being sad or angry is a complete waste of time. Looking on the bright sight surely doesn't change your current situation but it will make you better in some ways. I used to miss the bright sight by expecting something 180 degrees from the event that caused your sadness or anger but I learned that sometimes it is the simplest and little things that made us happy that day.
Not too long ago, I went to on a trip approximately 200 km away from my house and it took me four hours to get there even though I woke up at four in the morning. Traffic sucks but the bright side, on my case, is looking and enjoying the views that I usually passed with my high speed car. Even if it is only a tree or wild flowers, I enjoyed every single second of it. I was angry because it is taking forever and usually it's only one and a half journey. My car is basically going on a speed of 50 kmph but again I felt happy even if it is caused by the simplest thing.
So, I know that sometimes it is hard to look on the bright sight of every single bad situations (because most of the time it is not as simple as being stuck in traffic) you are having but you should always remember to look towards the light because shadows will always fall behind you J
I hope you have a great start of the week!