Carlo Ancelotti's problems with the domestic championships is a really interesting topic, because as his career suggests, the Italian is (or rather was) a really top coach. The main reason, in my opinion, is that his teams lack consistency, which is extremely necessary in marathons such as championships. Ancelotti is able to produce performance at the highest level from his teams, but he cannot maintain it long enough. That's why these tournament battles are his ''thing''. The main reason for the lack of this consistency (apart from the typical for him more relaxed regime of training and preparation) is the lack of sufficient control over the individual matches.
The Italian's methods lead to relying on the individual quality of his players to "get out" of more tied matches, and against equal opponents is played mainly on the counterattack. This plan is almost always successful, because the game plan for the match is strictly followed by the players, everyone is focused and fighting for the same goal. The problems come when his team has to dominate weaker opponents - usually the quality of his players is enough to win the match without much difficulty, allowing them to play offensively and have fun.
But when it comes out against a fighter team like Elche, for example, Ancelotti's team easily loses control of the match, put under pressure from the opponent. There are too many "open" matches against supposedly unpretentious opponents, which increases the risk of losing points, which at the end of the season weighs down the rankings. .