Nope, you're totally right.
A lot of people here just don't like to see age gap relationships for one reason or another, probably projection because they can't pull it off irl. They also like to pretend this shit isn't common in hs/college settings, like at least 5 girls in my class were dating older guys before graduating from high school ffs, just because you didn't doesn't mean popular girls aren't into that shit.
They keep saying "grooming" yet the series went out of its way to show that MC took her in without any wrong intentions and always denied her advances AND she's the one with the highly sexual past in the first place...where the F is the grooming?
Touch some grass please.