In your current situation, what is God trying to teach you? How is he trying to grow your faith? What lessons could you learn from what you are experiencing?
That difficult person might be the way you learn acceptance.
That particular job you hate might be teaching you patience or perseverance.
That feeling bringing you down might be an open invitation to do something more meaningful.
Instead of being upset at some of the events in your life, why not flip it over and ask yourself what God might be trying to teach you.
Teachings abound, but lessons are not always easily learned.