The supporting characters remain the highlight of the story, in that some of them seem to have their own motivations to pursue that don't exclusively revolve around ingratiating themselves to the MC. But other than that, it's pretty standard fare. The story loses a lot of steam as it goes, and a couple of characters who started off with interesting motivations get reduced to merely bargaining for position in the harem.
Maybe the manga version will edit out some of the chafe, but the MC gets isekai'd under the premise of defeating the demon god, and he says he's going to prepare for it. But then they spend dozens of chapters doing nothing but cooking, shopping, creating modern Japanese shampoo, and arguing about engagements.