I don't know why you are trying to hate on this show.
This show is clearly better than 99% of the rest in pretty much every area whatsoever.
The fact that there are shitty and sometimes unnecessary "pervert baka hentai" scenes doesn't really devalue it by much, considering that it's hardly the focus of this show and does not take up much screentime either.
The sad truth is that this is also generic anime humor. Just like phyiscal violence is used for comedic effect
So while it's fucking dumb it's still used as humor and as shown during the scene with Roxy we kinda get the drift that he wouldn't really truely do anything serious if the other person doesn't want it.
You can also talk about how MC is "40 years old in his head" - but even that doesn't really matter much when he also nearly cried because his parents thought he did wet his bed when he did some water magic.
The good truth is that "ecchi" scenes like the one with Paul and the Maid actually lead to something that is also seriously discussed in the story, that lead to further character development. Although I can hardly judge that as "ecchi" in the first place.
We can't really compare this to shit like "handy isekai" or "arifureta" (or whatever that was called). If you want to or do, I'd have to question your ability to judge something objectively.
It's also much better balanced overall (so far) than stuff like Slime-Isekai which shows that it's ahead of the mediocre-range too.
We don't even have to just reduce it to Isekai because the Isekai aspect of it all is rather small in the first place. It's a good fantasy world that feels alive right now.