@AH I get that logic but seems like a weak reason... It's seems like they threw in XY in with Jing assassination because they needed SNXY to assassinate her and cut all the attempted from plot so had no where else to put it but including XY is very flimsy logic.
FFYY doesn't like XY but we don't get any I must kill this person vibe. She loathes and hates Jing and attempted to kill him before.
TH got tricked and upset but I never got the sense he wanted to kill both Jing and XY. Didn't even look like he made any attempt on XY. He was solely on Jing. I know he agreed to kill her if he could kill Jing but it's weak plot imo.
For the second season the way they changed the story made it seem a bit rushed and the logic for some scenes flimsy...
For example why does XY want to get away from CX at the end? Because he wouldn't let her kill SNXY? I know some say it's because he killed XL but I don't think the drama supports that because we see no scene where she tries to get CX to spare XL after the war starts to show she is concern for XL infront of CX. I may have switched off and missed a scene or two... They completely butchered CX story. It's horrifying.
As others mentioned as well, the past about being upset for choosing the throne over her was also confusing... I can't buy that the characters wants the throne more than XY. I am not sure anymore but it's a confusing scene. Why did he have to confess then say he wants the throne.