Nah, you're just part of a loud and very vocal minority, who enjoy themselves basking in unsubstantiated claims.
Sure, we had more than half our team missing against a rampant Barca, but he should have won it for sure, anyway, amirite? They played us off the park that evening, and I have no idea what kind of wondrous tactics could have saved us.
We were a missed Müller pen away from reaching the final. No reason to blame the manager. Other teams are able to play good football, too.
Pep kept us at the top for three years, despite having to deal with ageing key players we couldn't replace by this day, and utterly stupid board decisions aka Kroos sale, which we are still suffering from to this very day.
That treble season really tricked the minds of a lot of glory hunters into believing we could, no should win the CL at our leisure. Well, they've had a serious reality check in the past 3 seasons, but fortunately there's always the solution to blame the manager.
Wonder, what you'll come up with if Carlo fails to win the thing this year...
That being said, this NYC guy should be ignored for good. Whether it's his observation of Alonso having been better for us than Kroos, or his idea replacing Lewa with Cavani, he usually comes up with outlandish claims which have little regard to reality.