Enlighten me on how king Booker thing ruined Booker's career?

he was booker t he was a low mid carder in the wwe but as soon as he turn heel he got the us title from benoit than won the king of the ring and became king booker he became world heavyweight champion finnaly the end of rey mysterios horrible reign and not only that king booker must have gaven bastista the most beating ever in the wwe nobody beat bastista as much as king booker hell him and kevin federline deafeated even cena who hardly ever loses and thus becaming champion champions, i think it helped booker's career