Why not? Because it's not useful to evoke a negative reaction for any negative event. It's counter-productive to getting over and improving your situation! Just get yourself better positioned to avoid problems like this one that may be frustrating you to all hell.
Recently (this year) I've just begun to understand the phrase "It's All Gravy" - Sometimes even though I'm a computer expert I can be a bit dull with trying to figure out a mainstream social convention. A few years ago I may have had to google such a phrase:
Thankfully though, I've finally learned how to relax and let go of stress and worry; whether or not my desk is completely organized and clean. Here's some more phrases that may ring a bell in terms of promoting positivity and living with that kind of life philosophy:
Fake it Till You Make It
Positivity Breeds Positivity
Negativity Breeds Negativity
Smiling Is Contagious
even
Your life is your life. Most likely, you have many years and decades to live. 30 Years from now if you look back, would you see a benefit from being mad in this current situation or would you be disappointed with yourself for wasting energy being negative? We can't solve all problems all the time. Mistakes are guaranteed in this life so make peace with imperfection.
I used to have a problem with stressing over the future. I would try to over-plan and be upset when things didn't go according to plan. Having strict plans could have got you into some excellent habits, got that new job or career, or helped you maintain a proper relationship. On the flipside, being so hardlined can wreck your mental state later down the road if you have an event (think car accident, family emergency, breakup, etc.) and even lead to mental breakdown like I nearly experienced this year.
Overthinking and planning even slowed my progress here on steemit. I would write an article and be disappointed and feel umotivated when no one would notice me and my content. As soon as I gave in, and started writing for me on whatever my mind felt like, I would write more passionately and be more rewarded and earning my place in the community. I took one mental step, telling myself to write more on steemit with no focused plan just that I needed to write, in fact it took me 11 days after for my first post LOL. And man, this was just 10 days ago and I've already grown to 170 Followers and my previous article on western lifestyle & philosophy made an awesome $100!
Another thing contrary to sticking to strict plans is the fact that will focus you on the future and expected rewards which may or not be there, vs enjoying the present moment. This life is wonderful and no matter what you go through, try to appreciate having these experiences; imagine all the things you learned and if it was a mistake you made how you can avoid it in the future. Don't allow past problems OR future concerns to dominate your present moment. Enjoying the now doesn't mean you don't have excellent hope and change for the future as well; they're not mutually exclusive.
Here's a Simple 10 Ideas You can implement in reaction to life's stressors
Two Words. Charles Fuchs. He's our man for motivation on Steemit right here. He's so popular that the top keyword in his articles is his own category; charlesfuchs. Believe it or not, he started on here hardly before I did, in May 2017. This is a perfect example of what it means to find your niche. I'm still exploring mine, but it seems right now it shall be philosophy. - Keep it Steemin'!
EDIT:
P.S. - A Motivational Call to Action I just thought of:
Forgive me 
