Without any doubt thee most unlikable character for me is the Post season 4 Margaret Houlihan. What she turned into after the Frank Burns breakup was so unwatchable for me. Her piercing high pitched screaming voice was nothing.but anger in every episode. They turned her into a b!tch. Her character before was to (blankety blank) every officer above the rank of colonel to get ahead. Then in the future episodes they forgot about her whoring herself out to become this saint of a woman. She changed her appearance to have a perm with curls and bright red lipstick in war zone and in uniform. She made the character so unwatchable going forward. I stopped watching after season 4 as her screaming voice was unbearable.