First of all, Rodri does not deserve any hate, the man did nothing wrong. Now to the allegations:
1- Real Madrid, Vinicius and sponsors (Nike) were told weeks ago that Vini won, allegedly through France Football in an "unofficial" way.
Nike spent millions in marketing materials, designing his new shoes, and events throughout different stores. This is why Vini showed his Nike underwear vs Dortmund.
2- This was an open secret, like it always is, but then suddenly UEFA and FF decide that this year they won't "oficially" pre announce to the winner who he is. Strange move but ok.
3- Rodri was allegedly not traveling. UEFA had to communicate that he had won so he would show up. Man City, in an act of class, allegedly told RM that they were told Rodri won, and that whatever info we had of Vini winning was false.
When you combine 2 and 3, it does seem that there were intentions to embarrass Real Madrid on live camera. This is why there is and should be outrage.