Eh, if I have to look at the screen for 5 minutes while drooling in order to "properly" lose that kinda takes the edge off. I saw pretty sure I lost my first battle with the imp but sure enough she fucked herself to 100%. In fact, I later went in to intentionally throw, and by basically doing nothing the Imp still got herself to ~90% love which just shows how minimal your efforts have to be in order not to lose.
Honestly?
Yeah. I think that's intentional.
He's not framing these encounters as battles. The entire game isn't about defeating the enemy in the best way you can I don't think.
It's more of a simulation game where your character fucks a bunch of girls in an interactive manner, takes them as his wife and then goes around adventuring and gathering more monster waifus.
You can tell that's the case since the increase in "Love" meter after cumming is so damn random. If you make her cum twice in a row and use tons of dialogue choices to get her love really high really early, the next time you cum your love will go up by like 20% or something which is ridiculous. Game's kinda cheating to make it a close encounter.
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That being said, it's much easier to lose encounters after the first encounter. If you choose to have sex anywhere afterwards, the monstergirl will be stronger, and if you get to love first, she won't increase her own love by that much (though even if you lose after the first encounter it won't gameover.)
There's no tension anywhere because it's not that kind of game.