What went wrong with The Seven Deadly Sins Anime?

Everyone seems to be aware of the tragedy of The Seven Deadly Sins anime, if not here's everything that went wrong with the anime.

Jericho (Seven Deadly Sins), Villains Wiki

The Seven Deadly Sins: Four Knights of the Apocalypse Manga Gets TV Anime - News - Anime News Network

Why do people say that season three of Seven Deadly Sins is bad? I saw no problem besides the slightly lowered quality of animation. - Quora

Why 'The Seven Deadly Sins Season 6' seems impossible! Know in detail

ANIME REVIEW: The Seven Deadly Sins

Anime Review: The Seven Deadly Sins Season 1 (2014) by Tensai Okamura

Review: The Seven Deadly Sins: Knights of Britannia – Destructoid

The Seven Deadly Sins' Season 5: Netflix Release Date Announced & What to Expect - What's on Netflix

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What Happened to Gilthunder in Season 4 of 'The Seven Deadly Sins'?

Review: Seven Deadly Sins

The Seven Deadly Sins: Anger's Judgement Sets Early 2021 Premiere