All due respect, but a lot about your comment rubbed me the wrong way.
I felt that, quite honestly, the developers put a lot of consideration into the romance dialogue options, in that they gave you an option for a "bolder" flirt and a "softer" flirt. As for the reactions, maybe you don't react that way, and I'm sure there are plenty of others who don't, but again the developers have put in a lot of work to make the characters and the MC dynamic. Maybe it's a building point for character development in the future, maybe it's not. Who knows? Everyone is different, and this is just the characterization they crafted for the MC.
Again, I mean no disrespect, but your comment wasn't criticism in that it wasn't constructive and was a tad insensitive of the time they put into their work - you didn't point out anything good other than that it was interesting. Criticism relies on an equal balance of noting and explaining both the good and the bad. You repeatedly put the game down in ways that are not easy to build from, for example "who the hell does that, the character is not a 16 year old teenager, the reaction was the cringiest thing I ever read," and "...seems like they came straight from harem anime or a cliche romance novel." This isn't criticism, it's just a complaint about something that you don't like. There is a huge, huge difference in saying "this is so bad, this is so cringy, I hate they way you did this," and "I think this can be worked on, maybe you can do this instead..."
I hope I didn't sound rude as well, that wasn't my intention either. And I don't want it to feel like I'm calling you out or anything, but these are just my opinions as someone who writes critiques for a living! I hope you're staying well!