I wouldn't say "bad." Because it's really an amazing masterpiece of designed misery and despair. But I'll go with Shrine of Amana in Dark Souls II. That place has literally made me want to cry before. It's ingenious.
You can't see your feet unless you walk really slow and squint to try to make out what's under water through the glare. And if you've never been there, and even if you have, it's easy to miss an underwater drop off... instant death. You can light a torch, which helps to see underwater, but there's a catch... it attracts all of the underwater monsters from nearby to come attack you at once. The place is littered with ranged caster mobs that do a fuckton of damage. You pretty much have to take them out with ranged, while dodging their shots, which is really tedious. But if you rush them, you're likely to get adds and ganked. And you can't pull them to you. They just stand in one spot and shoot at you.
Shrine of Amana > Blighttown, IMO, as far as misery and despair goes.
You can't see your feet unless you walk really slow and squint to try to make out what's under water through the glare. And if you've never been there, and even if you have, it's easy to miss an underwater drop off... instant death. You can light a torch, which helps to see underwater, but there's a catch... it attracts all of the underwater monsters from nearby to come attack you at once. The place is littered with ranged caster mobs that do a fuckton of damage. You pretty much have to take them out with ranged, while dodging their shots, which is really tedious. But if you rush them, you're likely to get adds and ganked. And you can't pull them to you. They just stand in one spot and shoot at you.
Shrine of Amana > Blighttown, IMO, as far as misery and despair goes.