It started with Vingegaard going against team orders on Bejes and backstabbing Roglic even before they ever set eyes on Angliru.
You may want to misremember or spin it any way you want but the truth is as follows:
Kuss got the jersey on stage 6.
Rog was best of the GC guys in the TT and got some time back but never attacked.
On stage 13 Jonas attacked his team and leapfrogged Rog who stayed back and did not defend. After this he was pissed obviously and stated that he wants to race for the win (I believe he wanted to race for the win even before this stage but did not want to attack so soon and believed he would slowly regain the time deficit to Kuss and win sort of by default). However, Jonas's attack changed everything in the dynamic of the team and what I found worst was Jonas's interview after the stage where he did not have the balls to say outright he attacked everybody including Kuss and Rog and wants to fight for red but sorta hid behind I did it for my daughter (as if others are childless).
In the end the team intervened and what happened happened.
But Jonas's behavior was despicable and I dislike him even more since then.
Like I wrote before:
After the Tourmalet stage when Remco was eliminated, Vingegaard proposed to take it like this to Madrid. In a situation where he was actually BEHIND Roglic and obviously Kuss.
This was reaffirmed by him at the rest day but Roglic and his camp wanted to "race it out" on the road.
This is all well documented, see here:
And before you all scream "Visma propaganda", all these positions were well reported during the Vuelta, this wasn't some hindsight twisting. You can also see the teammeeting after the Tourmalet stage where Vingegaard proposes to keep it like that and no one is forcing Roglic to say "Yeah I wanted to win" into the camera.
So the team agreed to let them race and immidiately after the rest day, Bejes and the fallout happen. So Vingegaard actually followed team orders by "racing" although the whole proposition was obviously dumb in the first place. Even after Angliru he reiterates in the interview he wants Kuss to win the Vuelta and the team finally pull the plug on the "fighting it out on the roads" project.
Now I agree that Vingegaards reasonings for stage winning ("For my daughter, for my wife, for Nathan, for my cousins dog") are mostly nonsense but it's pretty stupid to call him a traitor or backstabber when his opinion gets overruled and when he actually follows through with the "new plan" the fandom of Slovenian Valverde gets outraged.