I don't think there is a conspiracy against Real Madrid. Because the decisions were the right ones. On the contrary, there are many people who think that Real Madrid made the decision in their favor. Mbappé's absence will make it very difficult for Real Madrid in a difficult match. However, this mistake is Mbappé's. Because he tackled the Alaves player very harshly. He deserved a direct red card. Ancelotti should warn him about this. If Real Madrid hadn't scored, the match could have ended in a draw.
It's common knowledge about how UEFA and La Liga hate Madrid. I know this sounds a bit conspiracy theory, but those associations often put Madrid on the disadvantage. The red card of mbappe could also be assumed La Liga's effort to help Barcelona to win the competition.
About Mbappe, I also agree about ref's decision to give him a red card. It's fair enough, though he's not intentionally did such hard tackle to his opponent. He has to accept to be out from the coming games.