That was the landmark of DB's change from great to abysmal.
HEY GUYS THIS GUY WAS PRETTY MUCH THE NEMESIS OF GOKU, HE KILLED HIS ENTIRE RACE, ENSLAVED WHAT WAS LEFT OF IT, TOOK OVER AND DESTROYED HUNDREDS OF WORLDS, AND HAD AN EPIC FINAL BATTLE WITH GOKU THAT ENDED IN THE PROTAGONIST FINALLY TAPPING INTO HIS TRUE POTENTIAL FUCK YEAH WHAT AN AWESOME GUY
BUT WAIT, HE'S STILL ALIVE AND READY TO FUCK MORE SHIT UP, OH NO, NEVERMIND, THIS NEW CHARACTER JUST KILLED HIM EFFORTLESSLY. AND EVERYONE IS A FUCKING SUPER SAIYAN NOW WITHOUT EVEN TRYING.
Holy shit, what a fucking hack Toriyama became at that moment. Way to basically destroy everything you've worked towards in a single chapter.