"why the hate"? counter question; why the entitlement? you're not even planning on buying it and are complaining about it being delayed.
I can understand pirating AAA games, most of the developers are scumbags that like to insert microtransactions for more revenue, but most eroge titles are made by a small group of people, usually not more than 5.
If you want hentai games in the future here's a novel concept; fucking pay for them, the alternative being that developers won't be able to financially sustain making games and quit.