I don't think the same way as you do, Real Madrid lost the game against Barcelona in La Liga and this can be a reason to say they are not strong enough and there is some weakness in the tactic Carlo Ancelotti use or Real Madrid, he is an experienced coach but he lost the game against Xavi who is not experienced like him, while Potter didn't perform well and he is very much near to get fired from Chelsea that's why I think he should do his best to get a better result and save himself.
Barcelona especially xavi is very familiar with the playstyle of real madrid. Ancellotti was rarely doing some important rotations. He keeps using the same formation over and over. I would not be surprised to see that if real madrid was losing against barcelona last game.
The problem is barcelona is having so many young talented players while at the same time, real madrid is still using some old players like kroos and modric. Real madrid was accusing the referee was helping barcelona to win the el classico.
That reason is a common reason used by a team that was losing against its rival. I think that it will better if real madrid focused to get copa del rey and UCL rather than keep trying to find excuses when it was losing against barcelona. There is still another match to make revenge.
I hope that ancellotti will did some evaluation. The problem is now real madrid defenders are lazy as fuck. It can be seen from some chances that already gotten by barcelona in the last game of elclassico.
Well Ancelotti puts the best at the moment and if no one better than Modric, Benzema, Kroos and Vinicius, then it's the club's problem that he spent the transfer campaign that way. Ancelotti squeezes the maximum out of the squad that he has, most of the players are already old and nevertheless, in principle, Real Madrid can fight to the end if they want, but they can't do that in every match. The same way to beat seemingly outsiders is not easy and that's why sometimes such strange losses to 1-0 happen to Real.
Barcelona had a much better transfer campaign which resulted in a lot of young players who can keep up with the rapid pace of the game, playing both in La Liga and the Champions League, and then in the Europa League. Hence the result in the championship, but Real can still win the Champions League and then Ancelotti can also buy good players if he is lucky.