I agree with what you said about Lym. I also expected her to be someone who supports us no matter what, who is the pinnacle of trustable character, and even someone with who you can make jokes and just have a fun time. It really was a cold ass shower seeing her being so indecisive towards her own BEST FRIEND who she clearly loves based on the narrative. I get that she gets jealous, that's fine, but the game doesn't give you even the OPTION to console her. Your dialogue options don't matter most of the time, because the response dialogue is the same almost every time, and if you play the VN mode (like I did), you don't really get any feedback between choosing the sweet option, the understanding option, or the absolute dogshit option. It makes you feel... not powerless, but out of control, and not for the better of the story.
Also like I know that there is this difficult time between the two characters, fine, relationship development maybe, but then why does the game throw us into a random sex scene with her? It does nothing other than serve the AVN title, does not in any way change their relationship neither for the better or for the worse. Instead of those, I'd much prefer if her events were about them mending their relationship in some way or another. But no, they have a weird sex scene where they ignore the plot, or their relationship of that time, like it never happened, and that scene will be forgot the next time they talk about like nothing happened and they still (almost) hate each other.
Yeah, rant time over.
TLDR: I agree with what you said about Lym, 100%.