I've already made every.single.pilgrimage. Checked all journal updates. Yet no one will acknowledge my accomplishment, and I don't feel like doing that again ugh

You have spoken to one of the Temple Masters, right?

Endryn Llethan - High Fane
Feldrelo Sadri - Balmora Temple
Tharer Rotheloth - Molag Mar Temple
Tuls Valen - Ald'ruhn Temple
Uvoo Llaren - Ghostgate Temple

If none of the above can advance the quest then try this;

Journal TT_sevenGraces 100
ModPCFacRep 20 temple