Damn it, are people still asking for a "dark" Zelda? We got that! Twice! What do you think Majora's Mask and Twilight Princess are? There's even dark themes in other Zelda games too, like Ocarina of Time and A Link to the Past.
Those games aren't dark enough for you? Well then go play Darksiders. Although, technically plenty of Zelda games are actually darker in tone than Darksiders. But Zelda was never supposed to be "dark" or "gritty" or "mature". You're never going to get gore, swearing, drug addiction or suicide in a Zelda game. Doing those things won't make it better either. Stop asking for it.
If a "dark" tone is so important then you will just have to play a different type of game. You're never going to get Grand Theft Hyrule, so give up.
Those games aren't dark enough for you? Well then go play Darksiders. Although, technically plenty of Zelda games are actually darker in tone than Darksiders. But Zelda was never supposed to be "dark" or "gritty" or "mature". You're never going to get gore, swearing, drug addiction or suicide in a Zelda game. Doing those things won't make it better either. Stop asking for it.
If a "dark" tone is so important then you will just have to play a different type of game. You're never going to get Grand Theft Hyrule, so give up.