Please watch the tapes again, see how Asriel speaks to Chara and ask yourself if this is how a bullied child behaves.

Asriel wasn't bullied. Asriel adored the fallen child, as if the entire game didn't make it clear.

The entire backstory we're told in the New Home is about Chara living peacefully with a loving family. Look, no death, no blatant evil shit? Amazing, right?

The creepy face in one of the tapes? It was forced on Asriel's request, holy fuck. How does it mean anything, besides the one that Chara's able to make one?

Does making a creepy face when a friend asks for one make someone a bad person? Do you call people evil demons for that?

People explained what it means to "laugh something off" many times already, I won't waste my breath on this one.

Are you kidding me with the "killing themselves as the proof of someone being evil" crap? They choose a drawn-out, fucking painful way to die, every step of which is deeply awful to the body. They literally tortured themselves, using the same method which made their father ill.

Possession? You're joking, right? You do realize it's the same as if you tried to say that the six human souls possessed Omega Flowey? That's not how soul absorption works. Chara's will was there, but you really overestimate the influence they had.

Asriel agreed to collecting the six souls and it was explicitly said that the plan was about collecting six souls and freeing everyone.

Destroying humanity isn't even mentioned once, it's made up by people like you, who dehumanize a character, despite the entire game being exactly against that sort of thing.