Oh yeah, even a mountain Lion could pretty easily kill a Kängal. Most people just look at "power stats" (weight, bite force, height, etc.), but dogs in general aren't very fast. A wildcat like a mountain lion is lightning-quick, and they're literal killing machines; their very existence is to kill things, as with any carnivore. That's why most big wild animals could whip any domestic dog.
Re bears beating dogs…
Bears—Grizzly and Polar—are pretty much the undisputed rulers of the land animal kingdom. I remember reading an article some time ago about fights held in cages during the Gold Rush in California. Tigers were brought in from Asia and put in a cage with a Grizzly Bear, and food was used to bait the two predators. Tigers are the largest cats alive; 660 lbs of killing destruction, up to 8ft on their hind legs, 1,000 psi in their bite, the list goes on with how terrifyingly powerful tigers are. Yet, reports from the Gold Rush rings say that the Grizzly almost effortlessly would just keep sending the tiger sprawling with its massive paws. That right there was enough to tell me that no matter which animal you are, human or not, you don't want to mess with a bear. If a bear can whip a tiger, I'm sure there'd be nothing left of a Kängal, should they ever encounter each other.
And adult male Grizzlies on average weigh up to 700lbs…now let's not even talk about Polar Bears, which
on average weigh 992lbs.
Of course, I'm not advocating for predators to be put in a ring with one another. I don't think it's right to pit animals together for the sake of one's entertainment. I was just using the article for comparison and to show how dominant a Grizzly is.