I just saw your video. My condolences.

It's actually why I like Palace of the Dead. It's a game of chance. You win some, you lose some. It's an instance that's always different and you have to think accordingly. I save my potions and keep a Phoenix Down in my inventory to help when things go bad. It's not like a raid or regular dungeon where you have to memorize mechanics. It's all about randomness. It may be just a bunch of mobs, but it's not as easy as it looks. It's why it's my favorite content.