The Scripture exhorteth us to possess our souls in patience. When feverish angers overtake us we develop a tunnel vision where all we can see is the object of our anger and ourselves. We lose sight of happier, healthier, and more productive courses of actions. We also lose sight of the decency and beauty that does surround us. If you allow yourself to become fixated on the angry and the negative, you never will be happy.
Happiness is the proper pursuit of our human lives.
In other words, you go to school not so much to become a successful employee as to one day arrive at being a successful human being. This is honestly how I see it, although I fear I have spoken in terms uncongenial to a teenager. It might sound like a bunch of unpracticeable mumbo-jumbo, and maybe it is. Quoting philosophers and the Bible, etc. But take the time to find and embrace whatever helps you get through the day, that which makes life a little easier - no matter where you find it, no matter how you make the discovery.