The Undertale Effect

The Undertale Effect is a cycle that any form of entertainment media community can fall into.
Essentially, the community will COMPLETELY over rate the show/game/book/movie/etc., and defend it as if it is their life. The community will almost always turn the lovable, funny characters into cringe, and rapidly spread throughout the internet.
The strange thing is that the only outlets to suffer from The Undertale Effect are those from something that by itself is great. The show/video game/movie/etc. is usually great, and has many redeeming qualities but it is overshadowed by the atrocious and toxic fanbase.
Quite obviously, this is based off of the worst case of this ever happening yet - Undertale. I won't get into it now, but the smallest peek into the (dead now) community will tell you.
This has infamously happened to: Steven Universe, Five Nights at Freddy's, Minecraft, and unfortunately even Rick and Morty.

A term used when a video game or television show becomes unbearable to play/watch because of its fanbase.

By listening to undertale ost's your vrt increases by 100% causing you to get good kovaak's scores. Often people confuse it with 𝓪𝓲𝓶𝓫𝓸𝓽*.

*𝓪𝓲𝓶𝓫𝓸𝓽- a bot that aims.

A phenomenon in which a video game, movie, or other piece of media that was never intended to be perfect gets hyped up as such by its fan community, causing those diving in to have far too lofty expectations. This is followed first by disappointment when it fails to be perfect, then by backlash against the fans who hyped it up - and, inevitably, the game itself. This results in a cycle where the "fans" and "haters" become distinct groups who get increasingly vocal and vicious with each other, debates over its contents become less rational and more personal, until eventually all legitimate discussion about the original subject becomes impossible.

Popularized by the 2015 video game Undertale, as of this writing it is still extremely difficult to bring up the game in any context without getting attacked - either by diehard fans who refuse to recognize that the game has flaws, or diehard haters who refuse to recognize that the game has strengths.

Once something popular releases, the community and any content made about it WILL degrade and become worse overtime.

When a video game becomes popularly hated due to its fandom as opposed to the game itself. Part of cringe culture. Often results in a hatewagon.

A process in which an indie project (either show or game) grows so big to the point where people start hating it due to how big it is.