What was your *rage screech* Moment?

I'm not talking about an hard Moment but a Moment that you felt was sincerely unfair to the player. (This game Is nearly perfect so i wonder if there even Is One)

I'm gonna make a dumb example; i HATED the watcher knight as a bossfighf, i basically Just facetanked them with hiveblood (didn't had Shadow Dash yet) therefore did not really enjoy the bossfight and tòught of It as unfair; meanwhile It took me 10 times the Number of trials to beat NKG but i felt like every death was truly deserved, not once i felt like there was something cheap getting me (when i wasn't into the 2 Hour cycle of die and try again, then damn if i would have Said bad things about that damn Dracula).

What's your experience?

PS: Sorry for the poor writing and the bad form, i'm not a native speaker