I don't completely agree with you, player injuries are not caused by hard training because other clubs also do the same training in preparation for the match. Injuries can happen to anyone without warning, this time Real Madrid was very unlucky because the number of players entering the treatment room increased, most of them suffered ACL injuries which took a long time to recover.
Yes, now Real Madrid is in a difficult situation, especially since they really need a win in the UCL to improve their position in the standings, but the problem is, the opponent they will face is not an easy team to beat, Ancelotti must work hard in the next few matches by utilizing the players who are still available.
I also see players who are injured not because of heavy training before the match starts, but during the match, especially those who are most prone to injury in the UCL League. Real Madrid is currently very lacking in core players because they have suffered fatal injuries and have to rest, such as Mbappe and several other Real Madrid players.
Now Real Madrid must fight to win the remaining several matches in the UCL in order to qualify for the next round, Ancelotti will definitely take advantage of the players sitting on the bench to replace injured players. Ancelotti has to work hard to keep points so that he is not far from Barcelona in the La Liga standings this season.
IMO. Actually, the factor of Real Madrid players being injured is because they have a tight schedule and Ancelotti also rarely rotates players, Ancelotti should start giving trust to young players so that there is a team refreshment. Another factor is because they have a very tough player fitness coach, Antonio Pintus. Even so, Real Madrid's success in the last few seasons is also due to the hard training he has implemented.
The number of injured Real Madrid players will certainly make Ancelotti have to think hard, especially since we know they need a win in the Champions League to improve the standings. Likewise with Laliga, they must continue to maintain their consistency because they are six points behind their rivals Barcelona, but Real Madrid still has one match left because it was postponed. Real Madrid player injuries are also not half-hearted, on average Real Madrid players have ACL injuries which we know take a long time to heal, so Ancelotti has no other choice but to buy players in the transfer market later in order to continue to compete in Laliga.