I really liked Squirrel Girl from the first time I saw her all the way until issue #1 of Unbeatable Squirrel Girl. I still like that Squirrel Girl. If she ever comes back and replaces this in-name-only "Unbeatable" squirrel Girl, I'd read whatever she's in. She used to be an awesome, funny, unique character. Then, some yahoo (who had obviously never read a single one of Squirrel Girl's appearances, at least since she joined the GLA) gave her a horrible redesign (which looks basically nothing like the old design, so much so that they really can't be the same character at this point), and decided to put her in school, because...reasons. SG is also completely different from a character standpoint. She's been rebooted more thoroughly then the average New 52 character, and she came out just as bad.
So, yeah, in my opinion unbeatable Squirrel Girl is one of the worst books Marvel is currently publishing (at least when it comes to ongoing books, and not counting events or mini series), and "Unbeatable" Squirrel Girl is a terrible reboot of a classic comedy character. But, I don't hate Squirrel Girl in general. I really enjoyed the real one, and hope she comes back from limbo once the SG reboot runs its course. I doubt it will happen, but I can hope. DC brought back the classic Superman, so its possible that Squirrel Girl could be awesome again.