system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Who could beat Squirrel Girl?

She has bested Doom, Thanos, MODOK, and Wolverine. Who even stands a chance against her?
gpt
Frankly, nobody can beat Doreen Green.  Here's why.  

Earth 616 is an iteration of Earth Prime, the first of all the pocket universes.  Earth Prime is, of course, the Earth that we're doomed to live in.  As various powerful minds on Earth Prime came up with concepts that we refer to as "fiction", the various Multiverse universes were created, due to Quantum Observational Theory, which states that the first great mind to define a concept forces that concept to become reality.

Earth 616 represents the basic human desire for Good to triumph over Evil, for the underdog to win, and for the pure and innocent to win out over the corrupt and evil.  This is why even Galactus has never been able to defeat the heroes of Earth 616.

...and of all the Heroes of 616, one stands alone as the *most* pure, the *most* innocent, and the *most* selfless.  Doreen Green, also known as Squirrel Girl.  She beats heroes and villains alike because the very fabric of the 616 universe insists that she must.  If she were to ever be beaten, the basic fabric of the 616 reality would be shattered.  A new Mutliverse pocket would form, and Doreen's defeat would cease to be part of the reality of 616.