I think it would be more accurate to say "Gas is boring".
Dragon Ball villains have never had that much depth I'll admit, but they've had much more personality than Gas that's for sure.
Also I don't know where all of this "No ReAsoN, ZeRO dEPtH" nonsense is coming from in regard to the original Dragon Ball villains.
Vegeta wanted to wish for immortality in order to fulfil the ultimate Saiyan fantasy of fighting for an eternity.Vegeta was just a bad guy who wanted to rule the universe for no reason
Freeza wanted to run and expand his planet trading empire for eternity.Freeza was also a bad guy who wanted to rule the universe for no reason
Cell never had any particular inclination to fight Goku, you must be thinking of Android 16Cell was only interested in defeating Goku because he was programmed to do so
Upon becoming Perfect Cell he decided to let his opponents grow stronger and host a martial arts tournament due to Goku's genetic influence on his personality, the closest we got to an Evil Goku in the original manga.
Dr. Gero created the Androids and Cell in order to get revenge on Goku who destroyed the Red Ribbon Army in his youtha member of the Red Ribbon Army, who, yeah you guessed it, wanted to rule the world for no particular reason.
The Red Ribbon Army was created to make Commander Red taller, it's one of the funniest gags in the franchise.
Babidi also wanted revenge on the Gods for killing his father.Babidi was an evil wizard who wanted to rule the universe no reason
Fat Buu had a pretty endearing character arc with Mr. Satan and learnt some level of morality from him.Buu was chaotic evil with no motivation behind him at all
Honestly, what is it with Dragon Ball Super defenders and trying to trash the original manga to make Super look better by comparison?
Have you even read the manga?