For what it's worth I do understand how much it sucks when a CR character's arc doesn't end up being what you imagined. This is an incredibly longform show and sometimes you've spent years investing in a story before you realize that it's not at all what you were looking for.
I've been there with Orym. There was a long time where I had incredibly high hopes for a compelling deconstruction of the whole straight man good soldier boy thing. I was incredibly bummed out when I realized Liam didn't intend for any of that.
You do need to accept it, though. I don't hyperfocus on Orym every week and whine about how his story isn't working. I just acknowledge this particular character isn't interesting to me and that I at times find Liam's choices frustrating and then move on.
You can be sad Imogen's story isn't about accepting that her mom is evil and killing her or whatever, but that ship has long sailed. This is the direction Laura has chosen to take her character and you are under no obligation to like it, but at a certain point you're just gonna have to let go of the arc you wish you had gotten.