Overly sexualized characters in Anime haven't really gone away. In fact plenty of this stuff exists in regular seasonal Anime even today. Just if one has been into this medium long enough eventually such stuff starts to become desensitizing with prolong exposure. It's like some teenage brat isn't going to masturbate over the exact same piece of pornography almost every single day for over a year. Where something like that will simply just stop arousing them easily after being exposed to it usually no more than a few times.
It's just modern Ecchi entertainment has become more lowbrow since the early 2010s and sometimes just annoying to watch with stories that just don't resonate with a viewer like me anymore. Specifically if it's something that's produced strictly for such purpose to have the characters being the butt of humor at the expense of being sexually exploited like simply getting their boobs grabbed, as if that is really going to make someone laugh who has watched over countless of Anime titles where it's happen before. Where literally the last Anime I remember watching something like this that was extremely sexually explicit that actually made me laugh a few times was
"Why the Hell are You Here, Teacher!?" from 2019. Where even at times something like
"Mother of the Goddess' Dormitory" from 2021 almost became too cringe to watch for me where I almost dropped it. Even
"Peter Grill and the Philosopher's Time" from 2020 got old for me where I almost didn't even want to bother with it's sequel
"Peter Grill and the Philosopher's Time: Super Extra" from 2022. But since it is such a short Anime and it was on HiDive when I had an active subscription at the time, I just watched it for the hell of it.
Reminds me of how
"How Not to Summon a Demon Lord" from 2017 actually offered a premise I was interested in at the time and still offered plenty of graphic animated tits and Ass for those who would likely be extremely thirsty for such a thing, though the sequel
"How Not to Summon a Demon Lord Ω" from 2021 effectively killed the entire franchise with such a lame continuation to the story. Even gimping it's rollout with only 10 episodes as if the producers knew it wasn't going to do as well so why bother with even producing the average amount of episodes for a seasonal release.
If there is anything that needs to return from the past in this medium when it comes to sexual content, Anime could be produced again with sexual content where it's simply not just done for the main intent of humorous purposes and offer interesting stories with characters look way more mature again and not just a bunch of generic looking sexualized Moe school girl blobs. I always look back at stuff like
"Agent AIKa",
"Najica Blitz Tactics",
"009-1",
"Freezing",
"Grenadier", mainly just the 1st season of
"Ikkitousen" because the story started becoming stale after that,
"Tenchi Muyo! War on Geminar" (though the sexual content is mostly borderline used for humor), and even something like
"Witchblade" as exemplary examples of Anime offering some what of engaging stories that interested me and still flooding the Anime with plenty of sexual content as eye candy and not just "look I grabbed your boobs" humor.