A headcanon is something that ISN'T confirmed, but what you'd like to be true.

When he was created in a lab, one scientist accidentally mixed toxic drugs in his dna and now he’s insane

I wrote it

Funny. Me like

👍

likes his pizza rolls cold

Canon

I may be late but their favourite food is cereal…

…but the milk is poured first

Randomly goes into public and shoots a gun repeatedly

Always has been.
Canon.

the reason he was born as a psycho is that he was dropped onto the concrete when his mom left the hospital with him

Nah, he was made in a lab

was he made in some sort of container or what

i'll never tell.

He has traumatized childhood. Hence why he is an asshole and a bit crazy/insane. Also, I think the Malice I drew for you is a variant of the actual Malice.

Nah. But that guy is a variant

Accidentally shot himself in the leg because he dropped the gun

Meh, canon

Nah. He was born a psycho

wtf