critics of acts of utilitarianism raise three strong objections against it. According to these critics, utilitarianism a) approves of actions that are clearly wrong, b) undermines trust among people, and c) is too demanding because it requires people to make excessive levels of sacrifice.

https://iep.utm.edu/util-a-r/#:~:text=As%20discussed%20earlier%2C%20critics%20of,make%20excessive%20levels%20of%20sacrifice.