Exactly. No one likes being blindsided. AzzyxLiaden was never set up from the beginning and it comes out of fucking nowhere and you're suppose to be believe she's so lovestruck despite all the major interactions being with you. Atleast Cait is only after sex, I'm not made to watch her being loveydovey all the time with some random dude who helped one time. It's just Kinu and Ryn all over again.I think the issue people mainly have with Azzyran x Liaden is that it gives off Savin character vibes. If you've played TiTS you'll know what I mean. You get to fuck the character, but don't get too attached to them because you're just a fling, nothing more. It seems a bit worse here, actually, because you can "claim" Azzyran first and she is into you, but then she seems a bit more into Liaden, even though you've done significantly more to win her heart. At least most of Savin's TiTS characters have long established relationships before Steele ever encounters them.
TL;DR: There's a difference between a character not being exclusively with the MC, and then there's being made to feel like a third wheel. Also it can sting (pun intended) when a seemingly potential waifu turns out to be not so much of a waifu.
She's our companion, she's as busy as we are. She's not some random npc in a corner of a town. Now anytime we want to do any content with her, Liaden gets dragged along as baggage. You can't even fuck her if you're a dude and even as a woman they still treat you like the interloper. And shit is just going to get even more egregious down the line, so she's pretty much a dead end character for me.