What book character/series that is popular can you just not stand?

Hey so while doing our weekly zoom library storytime one of the books today was a series I cannot stand. I worked/volunteered in libraries for 16 years and mostly in kids so I have a lot of them I am not a fan of since I know all of them haha. The 2 I cannot stand more than any others...Caillou and the Pigeon books. I refuse to show my kids/nieces/nephews/cousins Caillou, as do most libraries actually for story times and a lot of moms have issue with Caillou. And the Pigeon is such a whiny bitch. What are some series other moms have issue with?