I don't think I've ever heard anyone say they actually find her funny, and whenever there's a Reddit post on "British unfunny comedians" she is always one of the first and most mentioned. I can't understand how she's managed to build a career when almost nobody thinks she's funny. I get comedy is subjective, not everyone likes the same sort of thing, but she seems to be universally disliked, yet still keeps getting work.
She was on a livestream comedy gig I watched with my partner during lockdown and we really tried, but ended up muting it until she was finished as she was just painful to watch. If I was thinking of going to a comedy gig and she was on the bill, it would definitely put me off.