From its tiny size limits to its byzantine threading and inability to follow all of one person without creating an account (which they often instantly ban, even if it does nothing but read)... Twitter is a communications medium constructed in a way that maximizes the ability ferment outrage and minimizes the ability to inform. Twitter is a platform for twits to be twits as an amusement to other twits.
Fortunately, you don't have to use it and a great majority of people largely don't. For some reason it gets fetishized by the media -- probably because twittishness is good for business -- and spun as if it were important.