Yeah, in today's football, a club needs a good coach and good players before the club can be consistent in winning matches. Since Ancelotti arrived at Real Madrid, he has won so many trophies for Real Madrid. This season is the only season Real Madrid has failed to win any trophy under Ancelotti's management, and I think the fault isn't Ancelotti's alone, but the injuries Real Madrid players have sustained this season play a role in why Real Madrid failed to perform well and win a trophy this season.
but even if it's not entirely his fault, he is one of the best coaches in the world and the fans had high expectations of him when he first arrived at real madrid. so it's only natural that the fans blame him for real madrid's poor performance this season. regardless of injuries to players that are beyond the manager's capabilities, the majority of fans will not see that, the fans only care that ancelotti is the best coach and with the best players real madrid's performance should be dominating, but instead real madrid's performance is getting worse and the culmination is that they failed to win a single trophy this season, it's just not acceptable to the fans.