I've finally gotten around to playing through Dark Souls 2, and I had very, very long sessions of "Aw c'mon!" one after another.
Fuck the Royal Rat Authority. Fuck it and everything it stands for. I fought it when I first got through the Shaded Woods, and I'm using a character that is mainly a sorcerer, with a Magic Shortsword +10, or whatever the infusion that adds magic damage is, if I need to take out something resistant to magic. Which is almost never until the Shaded Woods.
Now, I had heard the boss becomes a joke if you stay under it, but that didn't work for me. It would just charge and knock my character over if the first hit didn't outright kill me.
So I had to learn proper melee dodging from this one boss, because I can't use magic without leaving myself open for it to kill me. I kept trying to block it's charge attack, and dodge away from the swipe, which would leave it open to attack.
I rage quit so hard I was pissed off the rest of the day. And then I go and kill it in one try the very next day. That just pissed me off even more.
Apparently for melee characters, the challenge comes from the toxic rat-dog things that populate the boss arena. Not so much for magic users. This thing has no variation. If you're not close enough to touch it's balls, it'll charge you with an absurd hitbox. If you ARE close enough to touch it's balls, it'll do two swipes that can hit way further than you'll be expecting every single time until you get used to it.
So you'd think it would be pretty easy regardless of play-style. Good god no.