For nine years, fans had followed the life of Ted Mosby (Josh Radnor
) and his friends. They watched Robin (Cobie Smulders
) become the best news reporter in the world. They saw Ted become a successful architect and even Barney (Neil Patrick Harris
) sow his wild oats as he found out he had a daughter. However, they had faced many opponents to get there.
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There have been many guest stars that have appeared on How I Met Your Mother
, but only a few have left a lasting (and bad) impression. Whether it is their personalities or how they treat our favorite characters, here are the 10 worst supporting characters, ranked.