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The closest things are Fanon Discontinuity (fans would prefer to imagine the episode doesn't exist) or So Bad, It's Horrible (if it's really that awful).
If there are specific line items that are problematic, there may be Audience Reactions for it. But "The entire episode is disliked" is much too broad.
Other than that, it's not really what TV tropes is (or should be, in my view) about. Reviews, not tropes, are for announcing dislike of a work.

Are there any YMMV/Flame tropes that cover the following description:
An episode/film in series which is largely disliked by the community, which means that mostly wherever you look, you will more often than not find most discussion about it to be negative. Examples include Lost At The League for the Pokemon Black and White anime, The Rise Of Skywalker for the sequel trilogy, and Modern Warfare 2023 for the COD games.