Honestly, this game prioritizes the story and characters over the romance.
Which is NOT a bad thing, at all.
Unbroken Hours as a creator has always focus more on storytelling and complex and troubled characters, rather than typical otome romance plots you'd see in something like Re:Alistair++ from a similar timeframe, and leans more into those moments were connection is held, before life gets in the way again. When I was younger, (back in the lemmasoft days and the ren'py website and the OG Unbroken Hours Website days) I felt similarly to you, want more of my character in romantic moments with the characters we meet or know. Though, even then, it was more impactful for me to have endings that came from the character's own situations and lives, of what the world will and wont allow for the people in it.
It doesn't need to be like other otome games, because it is a full story, and a full world to see the corners of. The threads that make you realize your character will never have the full understanding of the world with any one path.. but you as the player get to see and realize how the world is tied together is frankly, one of my favorite things about this game. :)
If you want a more otome style game, their game 'Heartstring Bugs' might be closer to what you'd be looking for from this dev <3
tl;dr : its okay that its not like other otome games, its still fun and an awesome read.