Boss fights are meant to be the ultimate test of everything a game has taught you. At their best, they feel challenging, rewarding, and satisfying to overcome, although not every fight reaches that goal. Some rely on cheap mechanics, awkward design choices, or sudden difficulty spikes that turn the experience into pure frustration.
Instead of feeling like a fair challenge, these encounters can feel tedious, confusing, or even broken. Bad design or just questionable decisions brought these fights into being, making them the boss fights that players remember not for the victory, but for how exhausting it was to get there.

Malenia, Elden Ring
Her ability to heal with every hit, combined with extremely fast attacks, makes the fight feel punishing even for skilled players, often turning it into a test of patience rather than mastery.

Bed of Chaos, Dark Souls
Less a fight and more a platforming puzzle filled with instant-death hazards, this encounter frustrates players with unpredictable mechanics and repeated resets rather than rewarding combat skill.