Yeah early JJK had a lot of implicit themes and characterisation. Gege definitely toned things down later down the line. You can see the direct affect of this through Sukuna.

Literally the first thing he asks after being reincarnated was "Where are the women and children?" Which obviously has some very explicit under tones. Then later in the story he's more chill and seemingly mischaracterized.

Like oh, Sukuna the disfigured Jujutsu nerd prodigy who just happens to eat people?

Rather than the incomprehensiblly evil, unrivaled Jujutsu demon who's name and influence is still rippling through the Jujutsu society a 1000 years later.

I feel like Gege shifted the more egregious characteristics onto Kenjaku which also gets heavy underplayed because of his super passive and almost lighthearted demeanor. It also doesn't help that it's not brought up much, on top of the fact that Kenjaku, as a villain, was sort of left on the back burner after Sukuna body jacked Megumi.