Totally agree with you, the prologue was much more fun (story and gameplay). After that the game kinda feel like a different worse game!To be honest, the prologue was a lot better and more interesting than the rest of the game, and it would have been better if the game had stayed in the prologue.
The characters wandered through the forest, had sex, returned home, the end.
For me, this is more interesting than a strange BDSM sex cult.