True. I used to think so too but that goes to show that he's human.
Quick silver was beaten in xmen Apocalypse and shot dead in avengers age of ultron.
Superman who can be as fast as flash still gets beat up.
Supergirl too.
Having a super hero who doesn't get beaten once in a while can be boring. Thats why we love Jackie Chan movies. No matter how good of a fighter he is in the movie... He'll always sustain some kicks.