Have you ever a thought something like, "if I just get through this challenge, or achieve this goal, then things will become smoother and easier?" I'm embarrassed to say that I have had such thoughts many times in my life.
Although I've passed through many of these challenges, things didn't get easier. The challenges kept coming. The truth is that so long as we are alive, there will be challenges because problems and difficulties are part of the fabric of life.
Many years ago, Swami Veda Bharati took me aside and told me that "life is composed of packets of pain and pleasure; you can't have one without the other." He was referring to this same matter, that you can't live without having difficulties.
Just knowing this is wisdom.
Once it's realized that challenges and difficulties are part of life, we can set about facing and dealing with these difficulties rather than running from them or complaining about their existence. Then we can take the lessons the problems offer to help us grow.
So, anytime you're facing a problem and you'd rather be somewhere else, remember that only the dead are problem free. Otherwise, as Baba Hari Dass, a yogi and teacher taught his students, "Face, fight, finish." Face the problem, fight through it, and finish it---and be ready for the next problem to appear.