Roseanne and D.J. on Roseanne
I kind of like Roseanne (the character) in the first few seasons, but that show took a hard left turn when Roseanne (real life) hooked up with Tom Arnold. DJ was....I guess I didn't find him annoying per se, but he's a real nonentity of a character; which is weird seeing as Becky & Darlene (and later Mark & David) were well fleshed-out (how likeable they were is debatable
) The writers never seemed to know what to do with him.
I'll see your Doogie Howser and raise you a Barney Stinson (HOW I MET YOUR MOTHER). No sane person would ever be friends with this one-dimensional prick. Ted and Lilly are pretty terrible too. I love Marshall, and Robyn has her moments, but I find myself asking why I bother with this show, way too often.
I will also submit: Everyone from STORAGE WARS except Ivy.
And: amazingly none of us brought this one up until now: