I get that is her in joke, but doing research on it shows me 99% of the stuff happens off panel. The ones that do happen on panel(like Deadpool and Wolverine) do not really show her as that powerful. Also the Thanos thing, Thanos after that flat out says he figured out a way to make clones so good they fool cosmics. That..kind of seems like a nod at the whole Squirrel Girl thing. Since that is an oddly specific thing to mention.
For instance, if Squirrel Girl defeated a Living Planet..that shit would be all over the net, I assume it would not be hard to find, I mean..come on, a living planet defeated by squirrels? The meme's alone make me shudder, this would be something easy to find if it happened(I would think).