Real Madrid tends to expect their coach to be able to win titles every season and they also expect the coach to keep his team performing well throughout the season. This season Real Madrid failed to win several important titles, including La Liga and the Champions League. The Coppa Del Rey is a different title, but it is also the most important part for the coach to stay at Real Madrid in the long term.
If they have UCL this season I think it's special, they don't have ideal players. They don't have the best transfers. There are no big targets I expected from Madrid this season. At the moment Madrid is in a period of transition of players, some players are leaving and starting to get old. Beligham's arrival gives new hope for Madrid's quality next season. But that's not enough, they need a lot of other players to compete with Barcelona in the league and Europe. I think if Anceloti is a good coach, if he has support he will give the best results.
Anyway, Ancelotti only has one more chance next season to give his best for Real Madrid, because at the end of the season it looks like Ancelotti will actually go and become the coach of the Brazilian national team. Thus, I personally believe that Ancelotti will do everything in his power to bring Real Madrid to major titles next season such as the La Liga trophy and of course the Champions League trophy. But indeed, I admit that winning the Champions League trophy is not easy, but at least Ancelotti can bring Real Madrid to win all the trophies in the domestic league and that can be a good ending for Ancelotti later.