If you feel the same way, you're not alone. Every parent/babysitter/human being knows that he's the absolute worst.
Because some things are best shared, including hatred for Caillou, here are 23 of the best tweets about the most horrible TV character to ever grace our screens:
1.Parents everywhere fear him.
2.Hearing his name strikes terror in everyone's hearts.
3.Seriously. He's not popular.
4.All he does is bring fear and suffering to those around him.
5.ESPECIALLY to his little sister, Rosie.
6.Though at least he's realistic.
7.Although some find his utter horribleness comforting.
8.And apparently Cole Sprouse would like a live-action version of Caillou.
9.Some just worry about Caillou's parents.
10.Though some think they're up to the task of roasting their kid.
11.And some are over here just thirsting over his dad...