I haven't seen any post about this in the search option, sorry if it's already reported.
Being blue my favourite color, I usually try to match blue badgers with red or green ones (sometimes I even favor the numbers of the blue team ) in the arena. But it happens to be that blues ALWAYS die in one shot. Their only hope is to not get hit. Obviously, unless GREATLY outnumbered, red or green always win. I never, ever, have seen any injured blue badger. Red and green seems fine, they can stand some hits and against each other is usually 50% win chance for each, if it's a fair fight. But blue ones seem to have too low HP.