To most sane, normal people, being President of the United States is a job–the most important job on the planet. It comes with immense responsibilities, and can never taken lightly. To Trump, however, it is just a prize–similar to, say, the US Open trophy– that he won fairly by running the best campaign and being very popular. Governing was never really part of the equation for him; he just wants to enjoy a four year victory lap.
Predictably, he’s clearly not enjoying the experience thus far. If someone could think of a way to let him keep all of the perks and prestige of the office, while giving the actual power to Mike Pence, I suspect he would jump at the opportunity.