MK definitely has the worst QS options of the WDW parks, but I don’t think it’s inedible by any means. Maybe I’m just easier to please. That being said, if I can carve out time during my MK day I try to hop on the monorail and get lunch at Captain Cook’s at the Poly.
As for Universal, I think all of their food is pretty dreadful. I’ll typically snack throughout the day then find something at Citywalk for dinner. I do actually like Fast Food Boulevard a bit, but that’s largely due to the abundance of seating.