[lmm]

Stoicism tells you not to worry about the outcomes that you can't control, only whether your own acts (which you can control) were virtuous. But it assumes that you can perfectly distinguish the two, and gives you no tools for helping - indeed I'd argue that it makes those judgements harder by discouraging you from trusting your emotions. So either it's no help at all (because judging whether your actions were virtuous is a morality-complete problem) or it makes you dangerously unable to detect any mistakes in your moral judgement.