It's weird that he said that but I'm just gonna enjoy the anime for the wholesomeness. I wouldn't really care about some comments on the internet and rather just enjoy the anime. But that's just me.
A huge age gap, the man basically raised the girl since she was little and now wants to do her, it's basically grooming.
Also most of the comments I have read are from those who read the manga, they aren't just some random angry comments hating on it just for the sake of it.
And again that anime is not wholesome at all, there are other actual better wholesome anime out there.