What is the True Mewtwo Origin Story?

mewtwo a genetic freak created from the genes of mew from scientist searching to create the most powerful pokemon in the land. Mewtwo broiled with anger and agony of its existence and vowed to wipe all humans off the earth. During mewtwo’s reign humans tried to develop as fast as they could a device to which would be called the master ball. Attempt after attempt they kept failing to make this creation while the population never ceases to drop . To this their own creation was finally done yet only one human remained. Questioning if it was worth it what’s the point when all is lost. The human went to encounter mewtwo with this device in his sweaty hands. Made his final breathe to contain the threat that yveltal destruction reveals dim. Mewtwo still trapped in that ball at the cave where it resides. While around Pokémon develop to a civilization once prophesied. No records kept for they were destroyed with a civilization long ago. Will history scar the new apex with a mark of pure revenge. Or will the sealing of the beast bring peace to a worlds end.

Same

I have my own theory, though

Okay!

So in the video game Blaine created Mewtwo (if I understood, anyways)

I've only read one book of the Manga, but Blaine used Mewtwo in that too

But in the anime, Giovanni had Team Rocket make Mewtwo

So... what if Blaine was manipulated into helping create Mewtwo without knowing that he was doing it for evil?

There are of course things that turn down my full story of Blaine helping save Mewtwo from Team Rocket, but him being manipulated into doing it seems reasonable based on my knowledge