Is it really that difficult to relax at home?

It can be, yes. Stating an observation about my circumstances, I find that my thought patterns can alter significantly according to where I sit down.

If I sit at my work desk, I enter a state of general boredom and tediously pay attention to my various monitors. If I do nothing more than turn around and instead sit with my chair at the table which is normally behind me, I enter a state of critical thinking and desire to tackle problems. And when I go down to the snack room at lunch time and sit in one of the small tables while eating dessert and looking out the window, I immediately begin thinking of fantasy stories that incorporate interesting philosophical problems.

If I sit out on the porch of my family's cabin in the woods, looking out over the lake, I hardly think of anything at all.