There were many factors that needed to be taken into account when determining whether an anime was a bad ending. The following are some possible indicators that can be used to determine whether an anime is a bad ending: 1. Plot logic and structure: An unfinished anime usually lacks logical and coherent plot, has loopholes or illogical points, or the entire story structure is chaotic. 2. Character development: If the potential of the characters is too great or the relationships between the characters become too complicated for the audience to truly understand the meaning and motivation of the characters, then this can also be regarded as a characteristic of an unfinished anime. Ending: The ending is not happy enough or leaves too many mysteries to make the audience feel confused and dissatisfied. This is also one of the characteristics of a bad ending anime. 4. Audience feedback: The audience's satisfaction and feedback on the animation is also an important indicator to evaluate whether an animation is a bad ending. If the audience's evaluation of the animation was low or the audience was generally disappointed and dissatisfied, then this could also be considered a characteristic of a bad ending animation. It was important to note that these indicators were only common factors in evaluating whether an anime was a bad ending and could not represent the views of all viewers. Therefore, when evaluating whether an anime was a bad ending, one needed to consider a number of factors and take one's personal views and preferences as a guide.