From the perspective of the populace of the world of One Piece, all pirates are bad pirates, and to some extent, they are not necessarily wrong. That is more applicable to the infamous pirates, the most infamous of whom are the Yonkos. The Yonkos are these giant entities that rule more than half of the new world. And more often than not, the islands ruled by Yonkos are the safest, for obvious reasons.
With that being said, the act of putting a certain island under a Yonko’s protection does not overrule said Yonko’s evil. Kaido and Big Mom are two such Yonkos who do way more evil than good, but who exactly of the two is worse?
10 Kaido: No Bottom Line
You know a character is vile when they have no apparent bottom line. Kaido, an almighty Yonko who delivers terror to the entire world, has absolutely no qualms about mocking and attacking children.
We have witnessed him brutally attacking Tama for the sake of doing it, and making fun of Odin in front of Momonosuke for no other reason but to shame him. These are pretty low blows considering Kaido’s position.
9 Big Mom: Extremely Tyrannical
Big Mom’s tyranny, which manifests itself in many ways, knows no bounds. The upper echelons of the world know that refusing a request or an invitation from Big Mom is a stupid thing to do.
There have been incidents of nobles losing their loved ones as a result of them respectfully declining an invitation to one of Big Mom’s tea parties. This is just one example of the many tyrannical deeds done by Big Mom.
8 Kaido: Violent
Yonko Kaido has alcoholism and poor anger management in spades. And when these two aspects combine with each other, they create violence, another character trait that Kaido is rich in.
Temper and excess violence are Kaido’s signature traits. He is the kind of big boss who would utterly obliterate their minions for delivering bad news.
7 Big Mom: No Regard To Her Children
Big Mom could not care less about her children. For this Yonko, children are just mere valuable pawns; tools used to create political marriages and to further expand her influence.
And if that is not enough to highlight how bad of a parent she is, Big Mom showed almost no remorse when she murdered her own son; that’s how vile she is.
6 Kaido: Usage Of SMILE
The truth about the artificial devil fruits, SMILE, which has recently been exposed, is that it makes the already repulsive fruit even more repulsive. Kaido’s usage of SMILE shows how little regard he has for his subordinates.
90% of those who consume this defected fruit will lose all of their emotions save for smiling. Needless to say, this is torture. There are currently more than four thousand individuals who have lost their human emotions to this genuine devil fruit.
5 Big Mom: Taxes Lifespan
From an outsider’s perspective, Totto Land might seem like heaven on earth, which is nothing but a facade. Big Mom taxes 2 months of every citizen’s lifespan once per year; that’s a considerable amount of lifespan, to say the least.
Big Mom claims that those who are unwilling to pay may rightfully leave, which turned out to be an even bigger lie. According to Brulee, anyone who attempted to leave the "utopia" that is Totto Land met a horrible ending.
4 Kaido: His Control Over Wano
Despite Big Mom’s over-the-top tyrannical rule over Totto Land, her citizens are at the very least safe and content, actually a praiseworthy achievement on Big Mom’s side.
On the other side, Kaido literally doesn’t care about the citizens of Wano; he cares not a single bit about their safety and wellbeing. In fact, Wano might as well be the only nation that feels more unsafe for being ruled by a Yonko.
3 Big Mom: Manipulative
One thing that never ceases to flabbergast the fans is how these mighty Yonko do these shameless acts without feeling a bit of shame whatsoever. It’s frankly even more amazing how Big Mom resorts to trickery on a daily basis without feeling a loss of face.
Apparently, even the evil Germa 66 didn’t foresee themselves getting duped that hard by Big Mom. No one would’ve imagined that a Yonko could stoop that low.
2 Kaido: His Goals
Each villain has their own goals and aspirations. Big Mom, like most of the pirates, desires to be the Pirate King.
But Kaido, being the tool of destruction that he is, seeks nothing other than destruction. His goal is to start a grand war like never before; according to him, one that would rid the world of its mundanity.
1 Big Mom: Destroying Kingdoms Over Silly Reasons
Besides killing the loved ones of those who decline her invitations, Big Mom is also infamous for destroying entire kingdoms over silly reasons.
What outrageous crimes did these poor kingdoms commit to deserve such harsh punishments from Big Mom? They did not deliver their quota of sweets in time. Even a few days delay could lead to a fall of a kingdom.
