How's it an overreaction? It was hyperbole in response to a ridiculous post. The guy said stop complaining and enjoy the win.
One, that's not sports fandom. Fans analyze and possibly overanalyze games, even after wins. Two, we didn't exactly play great yesterday. The way the game ended was bizarre (and it's a recurring theme with McCarthy, questionable clock management), we had some real boneheaded plays that could have cost us (the blocked punt was idiotic), and the Chargers, frankly, shot themselves in the foot quite a bit.
Happy for the win but let's not go bat**** crazy and act like we just were awesome yesterday.