Attachment = Misery

All unhappiness stems from one thing - attachment. Attachment is a broad term - but it encompasses all the things we hold on to - including misery and dissatisfaction. Why would we have attachments if it causes so much misery? There must be a benefit. The main benefit is safety and comfort. We attach to things so we do not have to face what it feels like to be free and perhaps a little bit vulnerable. We don't like change. We want attention, for people to feel sorry for us, or somehow we are punishing ourselves for whatever reason. Humans are complex and we were placed here on this planet to go through all this suffering in order to wake up and realize the suffering actually can be overcome by simply letting go of attachments, control, and fear. Trust that things will be ok no matter what is happening at any given moment. Even the worst situation, death, war, torture, etc.. all these things can be overcome by releasing attachment, rising above and beyond the physical and realizing that we are immortal beings, we have lived many times before, and this one small lifetime is just a fraction of what exists. We are so consumed by our physical reality we forget who we are and why we are here. We are here to grow as souls and elevate each other - become awakened and awaken each other. To love and be loved. Be love. 
Humans have been playing a game for many thousands of years, and its those who see the game and watch from the outside who realize that there is more to life than this "game". 
It is also important to remember that all experiences, good and bad, are happening for a reason. Those who are not awake are just as important as those who are awake and aware. We need each other to grow. The universe is balancing itself out no matter how much destruction there is in this world. But if you can become awakened and rise above it, live with love and compassion, be love - life will become much more simple. Those small things that bothered you will no longer bother you. Those big things that bothered you will no longer bother you. Life becomes a meditation - where you grow, learn, and move on. Stop dwelling on what was - and be in the present of what is. Be thankful every moment of every day. Even if you slip into some negative mindset - catch yourself - pull yourself back out of it and remind yourself of who you are - an infinite being of love.