Do you know which anime ended up as a mess?

As a fan of web novels, I won't provide any information about uncompleted cartoons. However, I can tell you about some famous anime works whose endings or parts of their endings have been criticized or controversial for various reasons. For example," Your Name." It was a very popular Japanese animated film. Its ending was forced to be kept secret due to copyright issues, so the audience and critics were dissatisfied with it. In addition, the endings of works such as The Gate of the Stone of Destiny and Death Note were also widely debated and criticized. In the ending of " The Gate of the Stone of Destiny," the protagonists realized that the experiment they were doing was not to save the world but to change the world itself, which caused a lot of controversy and dissatisfaction among the audience. Although the endings of some anime works may be criticized or controversial, this does not mean that the endings of all anime works are good or satisfactory.