Dorothy's Prized Pupil episode when Rose, Blanche, and Sophia are on the lanai, those shorts on Rose were so ill fitting. It didn't compliment her at all.
I do agree with Jasper DeKimmel, those shoes Rose wore with that blue dress was hideous and didn't go together.
I don't like Blanche's blue sequined dress she wore to the dance marathon and also wore it when going out to dinner with Barbara Thorndyke. I just don't like sequins, they're hideous.
Dorothy's outfit when they thought Sophia was having a heart attack. That was hideous and I thought the top half was on backwards because when Rose was telling her Herring Surprise pie Dorothy did that fake laugh and turned around and buttons were down the back.
Also that ugly purple monstrosity Dorothy wore on her first date with Eddie. Purple is a beautiful color but it is hit or miss with clothes. Either you love it or hate it. Purple mostly work for sleepwear or sports jerseys.
One of Dorothy's rare nice outfits is the one she wore to career day IMO. It was simple, white blouse, pink blazer, and a printed dress but she wore it with those hideous boots. The blazer could have been more fitted instead of baggy but Dorothy was able to pull it off.