why walk from point A to point B? Run so fast your tendoms rupture.
A predator attacks you? Punch it so hard your own fist shatters then stab it in the eye with your own broken bones.
Gotta find a tactical solution to a really problematic situation? Think so hard you make chess masters envious and collapse from the mental stress once the problem is solved.
I want an animal that hybernates a lot and eats like a mofo to recover and prepare, but the few moments it is awaken it performs like a god in anything.
I know children can be born with such an arithmetic capacity to defeat grown adults in intelligence based games like Samuel Reshevsky for example.
I know children can grow really fast, specially whales can put on 90 kilograms of mass in a day, so fast regeneration is perfectly possible, repairing something is even easier than building it for the first time.
I know from personal experience that different hormones can make animals immune to pain and fear.
So what stops an animal that sleeps something like a few weeks in a row and when it wakes it can wreck havoc from evolving?
It goes like this:
Wake up > run till you find food, eat all of it and kill everything in your way, also eat it > find a hiding spot > sleep to regenerate your broken bones from all the fighting and running and also to digest the 7 people you ate on your way back.
specific problem = a creature that doesn't care about getting hurt at all, smart enough to solve most problems and with high energy demands thus the long rests.