I finally found a bad pizza - this is what I get for walking all day and then thinking I can have two pizzas in one day. Cocore in Vienna seemed to think that a mortadella pizza should be caked in cheese with mere splatters of pistachio and burrata. The worst part, though, was that they didn't remove the rind / edge off of the mortadella, which made it nearly impossible to eat because that stuff does not cut with teeth.
Rest assured I won't be going back - bizarre to me that this eatery was higher-rated on Google Maps than this afternoon's pizza eatery, which was quite delicious.