A scathing commentary on the absurdity of such "therapy" while also being a fun if somewhat messed up exploration of Cartman's character, "Cartman Sucks" is rightly one of the best Cartman episodes.

Source: https://collider.com/south-park-best-episodes-ranked-imdb/

It's hilarious to see the stark contrast between Cartman's superhero alongside Kenny's because when Kenny gets all the praise as Mysterion (and people genuinely have no idea who Mysterion is), Cartman is seen as an utter joke as The Coon.

Source: https://screenrant.com/south-park-kennys-funniest-quotes-ranked/