According to
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, Tears of the Kingdom (Zelda) had 1,148 people working on it, across several teams, while this game has one person, who's not even doing this as a full-time job, only in their spare time from their main job. There's a major difference there.
Also, patronage is voluntary. If you feel promises aren't being kept, or don't like what or how the end product is being delivered, don't pay for it. Simple as that.
And the "most popular" LI in an adult VN is likely to be one of the last to be "added to the harem" (so to speak). In this story, she still has some holdups that take a little longer to break down, but she will eventually crack.
I mean, look at
Grandma's House; it has been in development for over 2 years, and across ~45 updates (I'm guessing), the main title character still hasn't had the full D from the MC yet.