[reece(:]

For me:

Kathy ruined herself in All-Stars and it makes me look on her less fondly
Tasha was TRASH in Cambodia and it makes me see more through the lines on her Cagayan appearance and I don't stan her as much there
Dawn was so much worse in Caramoan but I didn't really stan her in SP anyway
Monica was worse in BvsW but I still love her One World incarnation
Skupin (no reason needed)
Jenna L.
Gervase!!! (He was diabolical in BvsW)

Some who weren't as good but I blame the editors:

Kelly Wigs, Brenda, Monica (Cambodia)
Kimmi was worse in Cambodia but partly due to editing and partly due to her being totally different to Australia