I hated Deborah
She was such a moody, miserable person who was nasty to Tony. Sure, Tony could be annoying at times but she treated him like dirt.
Not only that, her character was so boring too. She didn't even have the reactions or facial expressions to be a good straight person to Gary and Tony's idiocy like Dorothy did.
Sure, Dorothy could be a bit nasty too but she at least wasn't boring, moody and miserable and her sarcasm and snide comments were funny.