We asked TV fans and movie fans within the BuzzFeed Community to share character deaths that devastated them to the extent that it ruined the show or film for them entirely. Here are some of the several hundreds of submissions, starting with television:
WARNING: Some scenes contain graphic violence.
1. Sweets from Bones being attacked in a parking garage.

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2. Dr. Greene from ER dying of a brain tumor.

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3. Lexa from The 100 being shot.

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4. Glenn from The Walking Dead being beaten to death by Negan.

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5. Quentin from The Magicians sacrificing himself to defeat the Monster.
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6. Tara from Sons of Anarchy being brutally murdered.
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7. Carl from The Walking Dead being bitten by a walker.

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8. Poussey Washington on Orange Is the New Black getting killed during a confrontation.

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9. Charlie from Lost drowning.

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10. Michael from Jane the Virgin having an aortic dissection after initially surviving a gunshot.

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11. Silus from Vampire Diaries being stabbed by a dagger.

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12. Prudence from Charmed being killed by a demon shooting her into a wall.
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13. Rita from Dexter being murdered.

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14. Marissa from The O.C. dying in a car accident.

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Alright, now let's take a look at the movie deaths that ruined films for folks...
15. Black Widow in Avengers: Endgame.

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16. Rachel in The Dark Knight.

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17. Mystique in Dark Phoenix.

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18. Howard in Uncut Gems.

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19. Duke in G.I. Joe: Retaliation.

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20. David Dunn in Glass.

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21. The cat in The Shape of Water.

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22. Bill Murray in Zombieland.

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23. Tadashi in Big Hero 6.

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24. Six in 6 Underground.

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25. General Hux in Star Wars: The Rise of Skywalker.

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26. Kylo Ren/Ben Solo in Star Wars: The Rise of Skywalker.

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27. Rosie in Jojo Rabbit.

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28. Finnick from The Hunger Games: Mockingjay — Part 2.

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Note: Some responses have been edited for length and/or clarity.