I am pretty sure that actual NTR-Revenge is also just not really wanted by MOST ntr-fans... they want the NTR... even the wish to be able to end the relationship seems pretty rare and the wish to be able to take revenge even more...
Like, it makes sense, the audience between NTR games and "Revenge for NTR" sure has overlaps, but I doubt its a very big overlap, so I would guess that its simply not a efficent use of development time, considering the small potential audience

So yeah...." that many players ask for" ...those many players must somehow all magically only be visible to you
Thats just my guess, but yeah, most ntr-fans I have ever seen want the proper betrayel, the mc humiliated/downtrodden whatever, rarely see I someone asking for the comeback revenge story...
Personally totally love the choice of ending it and leaving tho... remember that felt reaaally good in that one otherwise horrible Marital Problems Phone game to give her and the Therapist the middle finger and go off with a cute girl...