Asexual And Always Shipping

Lie number 1: AFO was born evil.

The narrator (AFO, seriously, it's AFO) says things such as "The baby drained the lifeforce of both his mom and his brother.", "It was born an arrogant baby." and such but it really reads at AFO villifying himself to add to his own legend.

That's what babies do. Children, before they're born, kinda have to take their strength from their mother. That's why pregnant people aren't supposed to do anything taxing.

AFO and Yoichi's mother didn't die because baby AFO drained her like a vampire. She died because she was a homeless woman who had access to nothing and had to go in labor alone.

Same thing here: during twin birth, a twin is often bigger than the other (well, probably not to extent of Yoichi and AFO, but you get my point).

Lie number 2: AFO, as a demon baby, is shown killing for no reason, just because he can.

(First slaughter by Baby AFO shown in that chapter.)

There are two things that are strange in this scene (apart from... you know.... a baby murdering people...)

AFO had no reason to go after them because they don't have any quirks to steal.

It makes no sense for someone to attack a group of people with nothing to gain. I doubt that's the kind of behavior you have when you're in survival mode as you're barely surviving in the street.

However, a previous panel points at some context we might be missing.

The same panel that indicates that those guys don't have a quirk to steal also shows that they are wiling to do some "preventive attack" on a bunch of quirked people who might or might not be those who assaulted a protest group (reminder that in this context, that protest group are protesting the rights for quirked people to exist).

I could be wrong but odds are that they did something to be qualified as a threat to All for One and we are missing the additional context.

(Second slaughter by Baby AFO shown in that chapter.)

Now, the poor souls who just got absolutely wrecked by a toddler wearing what I suspect to be a garbage bag have quirks, which makes more sense than the previous scene.

However (and thank you for @aimportantdragoncollector for pointing that out to me), we also have this panel.)

Yoichi is shown with bruises on his face and might be broken teeth.

Probably because those same people AFO is shown killing attacked him.

Lie number 3: AFO never loved Yoichi because he can't love, he just considered that he was his. That's all. Nothing more.

(Just... Just ignore the rats.)

AFO didn't care about Yoichi so much that the very conscious first act of his life might have been to swim a river upstream while dragging his brother above the surface with what must have been the deathgrip of all deathgrip.

AFO didn't care about his brother so much that Yoichi was fed and clothed by an AFO who was malnourished enough for his ribs to show and who wore what's basically an improvised toga.

But he just keeps sacrificing what little he has for someone he doesn't care about one bit, that's just his first possession. Nothing more.

Okay, I am going to be clear: anyone who sees that panel and thinks that it's the proof AFO didn't like his brother... You just outed yourself as an only child.

Siblings punt each other for no reason. (There is a reason why the first recorded murderer was an older sibling.) In this case, the reason was Yoichi throwing a can at him.

AFO: "You're not inviting me to a fun activity? You're leaving me out, in the cold, unable to partake in brother bonding activity? Oh, vault for Little Brother! Vault for Little Brother for one thousand years!"

AFO: "Nevermind, we're reading together. All is well, I guess."

Lie number 3: AFO killed the glowing baby for power, because he could, or because the Glowing Baby didn't deserve it

Still laughing about AFO's flawless reasoning... "Comic books heroes' life suck. Better to be a villain. I already did the whole struggle thing, I want an easy life."

AFO killed the glowing baby because he was jealous. It's as simple as that. The glowing baby was considered the first official quirked individual (even though it's not true), was protected by his family (if I remember correctly, the mother of quirks was his mom) while AFO and Yoichi had no one but each other (EDIT: I was wrong, the Mother of Quirks was Destro's mother. thanks to the people in the tags), and had a ton of people following him (while, for some strange reason, people start running away screaming when AFO shows his quirk... What a mystery...).

The last panel was basically AFO saying "I want to be loved' but not having the frame of reference to even know what love is.

In conclusion...

While AFO is definitely a bad guy and a monster, he didn't begin his existence as one. He just wants people to believe that. Because his pride and his ego can't allow him to admit that he lived a childhood full of horrible trauma where he was a victim abandoned by society (to an even greater extent than the LOV) or he would probably combust out of rage and mortification.