Ngl traitor!YY is so good because if we go and stray from the cannon and look at a perspective where Yin Yu does agree along, I personally think it will be a toxic relationship (JunYin)

taking from some several points stored in my moldy expired brain, here's why (1/?)

Jun Wu's inherently a fucked up character and even though I like his character and TGCF, I strongly feel that there's still something lacking in his character lore. (this is just mine so don't delete me for it) anyway, aside from how his tale transpired, (2/?)

I think he really just needs someone that will ground him down and he wasn't aware of it (until his defeat) so to say he was lonely and was grasping for someone to tell him whether is he doing good or he needs a hard stop comes naturally with it. (3/?)

traitor!YY's character is sorta perfect for that.

despite that I don't think Yin Yu largely blames QYZ for what happened years ago, it's impossible to say the man holds no resentment. He's no Shen Qiao (QianQiu) after all. he's resenting for sure. (4/?)

YY's like a good substitute for MNQ as well.

he's upright, skilled, handsome (sorry dianxia i disagree with you on this one. bc youre a simp for huahua) and knowledgeable.

that's also why i think JW wanted him in his group. to be honest, I think if JW persists to (5/?)

push the brocade issue and over analyze it in a really really bad way so he can slap YY into blackening, i really think Yin Yu would agree under the premise of his ambition, greed and vengeance.

a good person has limits after all. (except Shen Qiao HAHA ily)

fast forward (6/?)

and YY agrees, I still think some of his voice of reason will retain but will be pushed down as something he will casually ignore until he would occasionally be frustrated over with (AKA fighting himself and other problematic actions towards himself)

and what will JW do? (7/?)

man, i mean the dude would do everything to push dianxia to be his heir, he would even kill to keep his high seat as well.

of fucking course he'd placate the turned-to-problematic Yin Yu and abhor the remnants of Yin Yu's sanity while knowing clearly about it. (8/?)

it's the toxic relationship where both parties are mentally fucked up n refuse to go to therapy thinking they know what they're doing

One likes how fucked up they are and the other is continuously losing himself

and they're going to rule the heavenly realm

thanks @RYUUSElMARU