I think it's both.

Even while being aware of my unrealistic work expectations, I often still find myself being disappointed when I reflect on my day.

Not being productive isn't what makes me disappointed. It's procrastinating in ways that don't even make me happy. It's too easy to be sucked into hours of binging youtube, reddit, wikipedia, or twitter.

I know I'd get way more satisfaction by going on a hike, practicing piano, learning a second language, or calling my family. But the simple distractions are too convenient and addicting.