You are pointing your anger in the wrong direction. The reality is that security is a hard problem, much too hard for Blizzard, much too hard for RSA, much too hard for banks, and much too hard for governments.
Major companies being hacked is not a new phenomenon. What's new is them (a) detecting the hacks and (b) disclosing them. It's unfortunate but true; you should be happy that they are telling you.