thought id take a crack at an obscure sorrow because the dictionary of obscure sorrows still doesnt get at everything i want words for
laccevenomism - /læt͡ʃːəˈvɛnəmɪzm/ or /lækːəˈvɛnəmɪzm/
the frustration that one cannot express discomfort because the person or situation causing it is doing something socially perceived as "good" or "selfless".
can be shortened to laccevenom if used to describe the feeling (i.e. "slowly building laccevenom") or if used in a less abstract context (i.e. "her face betrayed hints of laccevenom")
idk i think this would resonate with a couple people out there because "communicate when you're unhappy :)" advice seems engineered to coincide with a maze of situations that don't let you speak out about things.