Although I enjoyed him in Last Salute to the Commodore I wasnt crazy about his portrayal of "Murch" in Lovely but Lethal. Drunken fat doctor.
Of course Im referring to Fred Draper.

I can imagine people disliking Darryl the hairdresser because he's kind of a stereotype (not that Pete said that that was his reason), but he's not a NASTY stereotype. He kind of reminds me of the two BARNEY MILLER characters "Marty" and "Darryl" (and the BARNEY MILLER Darryl was scared of the police for the same reason as the COLUMBO one), and they weren't nasty stereotypes either.

One last annoying character, I probably overlooked her because she was overshadowed by Mrs. Peck, is Lisa Chambers played by Julie Newmar. I actually like when Columbo interviews her and she’s super nervous. But I don’t like when we first meet her and she bursts into the house and runs upstairs like a child. I get that she wanted to portray “flighty”, but she really overdid it.

I can't stand the Sgt from the Pentagon in Grand Deceptions. The story isn't great as it is but that awful scene at the funeral where the Intelligence Sgt is trying to be "under cover" when talking to Columbo makes me cringe every time.

It's like he's doing everything in his power to attract attention to himself with the changing of seats and the whispering out of the corner of his mouth.

To be honest, everyone involved with this story is awful from beginning to end but as we are talking only about secondary characer's then that would be my pick.

Yes, "Grand Deceptions" was a weak entry and that was due, in part, to some poor performances by supporting characters. The "recruits" and the "undercover" Pentagon guy were all cringeworthy. I enjoy Stephen Elliott and at least he showed up.

True, the scenes with the General and Columbo are the best bits of a weak story.

I seem to remember the lady who played the General's wife, wasn't really an actress, she was a dancer and Grand Deceptions was the only screen work she'd done.

I'd cast my vote for the Air Force General from "Swan Song" - VERY corny and over-the-top performance.

What about when Columbo goes to London in Dagger of the Mind - a character called Fenwick - who has the umbrella in the bar. He gets annoying especially when he's saying things like 'how very gracious of you, very gracious'

Not sure if she qualifies as a "secondary character", but I have to nominate Tyne Daly as "Dolores" in "A bird in the hand".

Fake drunkedness
Fake southern accent

Fake, fake, fake. I just couldn't stand her.

I find Tyne Daly to be an excellent actress, but I do prefer her second appearance as the down-on-her-luck, skid row Dorothea McNally. Her drunken stupor feels more nuanced and realistic in "Undercover" than in "A Bird in the Hand".

While I'm here, I'll add Brenda Vaccaro from the awful "Murder in Malibu". Between her and Andrew Stevens, it's hard to say who should get the prize for worst actor in the entire series. Terrible episode that I have a hard time watching anymore.

I have to agree with you on: Brenda Vaccaro from Murder in Malibu. She made the episode pretty much unwatchable.