There surely is a very large grey area between your comments and 'we should have done better'. Before Juventus this season the only European powerhouses we faced were the eventual winner playing an outstanding season. Obviously the 0-4 was a big feck-up but no matter what tactics Guardiola would have chosen last year, we would have lost against Barca. There's just no way to beat them with our biggest strength, the wing play, completely taken away through injuries. He got his tactics wrong in the first leg, but I won't crucify him for trying something risky with a team lacking options. Heynckes wouldn't have won anything with Ribery, Robben, Alaba and Martinez all out injured and Lahm, Schweinsteiger still regaining fitness after long injuries, I'm fairly certain about that. In the end, we easily topped all our groups and beat what came our way until we faced the eventual winners. That's nowhere near as bad a record in the CL as some seem to suggest.
Anyway, back to yesterday. The tie against Juventus is nowhere near as dark as you paint it either considering how brilliant we played in the away game, especially from a tactical point of view. Juve's home record in the CL under Allegri is 7 wins and 3 draws now and no one came even close to dominate them like we did in their stadium despite our make-shift defense. Somehow no one wants to give Guardiola credit for that though, which seems proper mental.
The next part is probably a bit controversial on here, but I'm still not convinced that Guardiola got his tactics completely wrong yesterday. The first goal, which was simply a massive individual blunder by Alaba and Neuer, prevented us from knowing. Conceding such a goal is just so huge. Under Heynckes we got lucky with that deflected Alaba long range shot early against Juve and the whole tie became so much easier for us and so much more difficult for Juve. Yesterday it was the exact opposite and our reaction was overall brilliant. I've seen countless times how German teams (actually teams from all nations) ran against a well organised Italian defense and failed to create anything while being constantly under danger to concede on the counter. We gained more and more control as the game went on and Juve got more tired and eventually we broke through and turned it around. That you don't even want to credit Guardiola yesterday with a win makes it even more stupid. We fecking won the game. Yes we got lucky, but hell, we showed so much passion and determination to turn it around that I just don't get how crazy spoilt you have to be to not enjoy it and give credit for at least some of the tactical decisions Guardiola made over the two legs, certainly for the first leg and for his changes in the second half yesterday.
But then again, it all comes down to how lowly you rate other teams and how easily you expect us to kick them out of the CL. That's what I actually find insane about your comments on here and why I believe you're totally out of touch with reality. Juve is a brilliant side, arguably top 5 in Europe right now and level with the likes of Atletico, PSG, Real, Dortmund. There's not much in it and we can go out against all these teams even if we're a bit superior (and I'm not sure we actually are with our injury record or at least not by much). It seems as if many people are so busy calling everyone other than Barca shit, that they don't realise there's quite some depth in terms of elite teams in Europe right now. It's great and I'm looking forward to the next tie and expect it to be again a close and dramatic affair, because I absolutely loved the tie against Juve. That was quality football from two excellent teams and neither side deserved to go out so early in the tournament. But that's what happens in the CL.