Stuff ppl with #depression hate hearing: "Have you tried <insert treatment here>?"
Actually this one isn't so bad, because it comes from a place of wanting to help. Somebody asking this might offer an ineffective suggestion, but at least they're not trying to be a dick.
@AlphaCentauri OMG Hyperbole & a Half is amazing for how well they grasp stuff like this...
& honestly, the way mental illnesses manifest for folks who have them is sooooo varied. Severity, symptoms, & so on have some commonality, so what works for one person may not help another. Some folks get good from nootropics, others need hardcore medications. It just depends.