One of the main reasons people have an issue with Yandere Simulator is because the main character, Ayano, is portrayed as a pure yandere. She is constantly being pursued by male characters who are interested in her. This can be seen as unrealistic and exaggerated.
The game requires players to eliminate their rival within five days, or else the rival will confess their love to the protagonist’s love interest, resulting in a game over. Some players find this time constraint to be frustrating and stressful.
Sometimes, the game’s depiction of love and obsession can be seen as problematic. Yandere characters, including Ayano, are willing to use violence and manipulation to get what they want. This portrayal can be disturbing and unsettling to some players.