Truly, the easiest way to be happy in life is to not desire anything. You would not be unsatisfied with a bumpy or uneasy ride if you didn't want a smooth ride to begin with. Desire will always breed dissatisfaction. We are dissatisfied simply because we desire. Think for a moment about the most common concepts we write about, whether they be in movies, anime, or books; they always have a conclusive ending. Sometimes even a happy ending. Why? Because it justifies the commitment of staying with the story. Why would you read or watch something without a good ending? This is a thing humans always say because it's something we don't have in real life. Humans always like and want what isn't theirs or what they can't have the very most. Life doesn't have happy or conclusive or even satisfying endings. We simply edit and reverse reality to make it pleasing. And humans will never truly be happy this way until they stop wanting a happy or conclusive end to their lives.