I don't know why people think that Sans can beat Omega Flowey

He has 6 human soul

1 human soul = Every soul of the monster

Do you understand ? How much Omega Flowey is Powerful !

He is so powerful He can break the rules of the game

For example, he doesn't die when he has 0HP (just watch the end of Omega Flowey's Battle)

And also, in the pacifist ending, remember Omega Flowey grab Sans and eat his soul (to become Asriel Dreemur)

Understand ? Sans is so much dead !"

And don't take care of the animation Glitchtale, many people think everything in the animation is true but it is just a fan made