I guess you played it with the walkthrough/mod/cheats/whatever, but there are several chances that you don't end up with a harem; sometimes you only end up with one, depending upon your choices.
And it did not escape my notice that you didn't mention the other game in question, which neatly rebuffs all of your concerns.
But that's neither here nor there. There are lots of reasons to come here and whinge about the games - greedy/lazy devs, buggy games, lame storylines, all of the characters looking the same, etc. And yesh - sometimes the predictability of the plot. But here's the thing - these are porn games, my friend. As far as story goes, Steinbeck or Mishima they ain't. Just like in a porn movie, the pizza delivery guy does indeed want a tip, and that is not a banana in his pocket - he is happy to see him/her.
It is, for the large part, fantasy fulfillment, masturbatory aids. Sort that bit out, and just about everything else falls into place.
So, if you are aiming for a Pulitzer or an Oscar, I suggest you roll up your sleeves and get to writing. Then find someone to do the art [aka, the heavy lifting], put out a game and await the sort of scrutiny you seem peachy keen with unloading on others.