“Bertha Bloodhound collapses in front of the Dunkin’ Donuts in order to say goodbye to Fatsy Spatsy, her childhood love, that dumped her for Zelda Crumbrunner.”
Of course, that bolded word should be who. I know it’s a silly thing, but I see this all the time, and it bothers me. It’s a writer’s job to communicate properly, and this includes knowing proper grammar. If you’re talking about a person, it’s who. If you’re talking about a thing, it’s that. Capice?