After noticing the debuff, I got in contact with a level 56 healer and he said there is no way to remove or even weaken it. Other players with this debuff usually run out of max HP in a couple years. They can still log in, but there's not much point because the debuff drains their STR and DEX so much they can't even defeat a level 1 crab anymore.
Why did the devs add random debuffs to the game that make your character unplayable? Don't they want players to keep logging in? I could understand if my character got hit by a hex from a high-level warlock in PvP, but completely random debuffs?
Are there any high-level priests here who know whether we get sent back to the character creation screen when our character runs out of HP? I never understood why this game only has one character slot. I could just switch to an alt. Hopefully I'll be able to play a better game next time, because let's face it: this one isn't that fun.