Nein, this manga has poor rate because it's an isekai-ecchi-harem combo, it has nothing to do with the censorship, characters, plot, etc. that's how it is here.
Oh my god, is this real? A shonen protag that actually has sex and isn't clueless? Have we seen the pearly gates?
I'm glad that the author didn't wimp out and make a character whose entire motivation is sexual intercourse into an eternal virgin for reasons beyond his control.