slope down backyard making cutting grass miserable

The house we currently have, the backyard have a slope that make cutting grass miserable. The frontyard I only cut trim it when the two neighbors on both sides do their cut their grass in which they do it almost weekly 🙂 which forced me to do the same thing 🙂 otherwise will look bad. They cut it real low, to me, I think it’s better to cut it high during the spring summer fall or so to let the grass suck in as much oxygen as possible to have strong root, also I have a tons of clovers growing all over the lawn, my daughter said our lawn look better because we have flowers growing lol, she doesn’t these flowers are wheat 🙂 which most people would destroy :). Anyhow the back yard grass is another story, it have a slop down when cutting grass I think I burned thousands of calories pushing the lawn mower up and down.