The antonyms for the phrase "turning out well" could be words like failing, floundering, faltering, or collapsing. These terms essentially represent the opposite of success, and indicate that something did not go according to plan or expectations. Other antonyms that could be used include foundering, struggling, or falling short. These words could be applied to a wide range of situations, from a failed business venture or academic test, to an unsuccessful relationship or personal project. While it may be disheartening to experience a situation that doesn't turn out well, it is important to approach these challenges with resilience and learn from them.