Have you ever seen a stonemason split a huge rock? He will hit the rock many times just to draw a straight line. Then he will strike the rock on the sides to guide the fault. After tapping the boulder many more times in incremental steps he will, at last, give the stone a final blow and split the rock. Sometimes when we work, it is hard to see the cumulative effect or results. There is usually no easy way so expect difficulties and solve them in progression. All choices lead somewhere. Fix the difficulty, do not place blame. Define the problem and then adapt to the challenge.
Happiness has less to do with your circumstances than how you perceive them.