That's an interesting take on the game's lore. To me this game introduces some lore elements that i'm certain everyone here is familiar with. "Oh that demon lord, always with the "taking over the world with sex and lust" antics! He's at it again!" and then there's the magical girls / boys with super powers going against them. Nothing really new here. However, with this game, it is possible to twist it a bit. Here we play as the demon lord instead of the magical heroes and we can catch a glimpse at the organization behind them.I think the guy's complaint is.......
Reminds me of one scene from Legacy of Kain, when Raziel talks to Kain about the Sarafan being the good guys taking on the corruption of the Vampires, and Kain talks about them not being the saints he believes them to be, having their own agenda behind the scenes. No way the organization behind the chosen are the saints in this game, they have their own goals in mind. You can see how the humans treat the chosen in the vignettes sometimes, and it's not pretty.
I love how things can go either way in this story, so you can headcanon and twist some things the way you want. It certainly is flexible enough. While i was playing the game, the only part of it the i just couldn't go through due to it being way too...rough, let's say, was the Aversion system. Some people will enjoy it i'm sure, but to me it's just too much, so i never pursue any of it. The normal battles though is okay, it reminds me of some other battle sex games where the heroes tend to react very much the same. In these fictional worlds where battles take place as "sex battles" instead of violence (again, if you switch violence to tickling), it's pretty much the same, maybe that's why i'm having a different reaction to this aspect of the game haha
Edit: Yu-Gi-Oh! did the same now that i'm thinking about it.....remember GX? The military had those cards being guarded by vehicles and that exaggerated stuff? Can you imagine wars being done by card games? xD