I disagree. I think they're awesome.
They're ruthless because they need to be. Wild Orca's need to eat up 300-400 pounds of food per day, as they expend a lot more energy swimming around and hunting their food. I do think its unfair how smart they are compared to the other mammals they hunt, but they don't call them wolves of the sea for nothing.
I mean look at this brilliance.
http://www.discovery.com/tv-shows/frozen-planet/videos/killer-whales-wave-wash-seal/