Are animals really that strong?

Like I can easily beat a dog in a fight,one punch to the face that dog would probably be in shambles (I love dogs i would never hurt them),and also most animals have no hands,so they have big disadvantage when it comes to combat,only thing animals without hands or big paws can do is just try to bite you. And also your smarter,so you can locate animals weak spots,and attack them,and you have adrenaline so if a animal almost defeats you,you can just take him out in one punch. At most I can see a average person defeating a mid sized bear