Music is one of the most important things to me in media and can enhance so much (of everything). Soundtracks aren't just there to make things less boring, but actually do so much to enhance the atmosphere and emotion and storytelling (and should contain storytelling within the music itself, like through motifs and reprises and stuff). However, I do tend to be more forgiving with otome games, as I do mostly treat them as novels (and novels don't have music), so unless I feel like the music actively does not fit with the scene or distracts from it, I am usually fine with it. The main point is the writing itself, after all.
But also, if you're going to make a visual novel (where there's still going to be music and general sound design), rather than just a novel, I feel like you should actually make use of that medium and focus on making the music good (as well as the decisions of when and when not to play something, and what music is chosen for different scenes). I also think there's so much potential in using music in innovative ways to help tell the story rather than just playing a limited number of tracks at certain times, like maybe having variations or layering of the same song in different ways, or having it change a bit more dynamically. Maybe the more interactive element of a visual novel could be utilised in some way, just like in many non VN video games, where the music is impacted by your interaction with the game? At the very least, I would like to see more cohesive soundtracks, where there is a main theme and characters themes, etc, that get reprised and modified, or just soundtracks with more storytelling overall. Again, I'm not as bothered when this sort of thing isn't done (especially for visual novels) as long as the music doesn't actively take away from the experience, but I think games are highly enhanced by a good soundtrack (not just in terms of sound, but as a storytelling device) that is carefully crafted by a composer.