When it comes to expressing difficulties, there are numerous synonyms that can be used instead of "having trouble." Some possible alternatives include grappling with, experiencing difficulty, confronting a challenge, encountering issues, facing obstacles, struggling with, dealing with problems, stumbling with, feeling uneasy, encountering hiccups, enduring struggles, undergoing hardship, or being up against roadblocks or road bumps. These phrases can help convey a sense of complication or challenge in a more nuanced way and may allow the speaker to express their struggles in a more precise and effective manner. In any case, selecting the right synonym may be critical to conveying the intended tone and meaning.