Even though I think the OP is a bit OTT I do agree with the sentiment that we didn't really kick on like many of us thought we would after 2012, I thought we'd dominate for a few years at least as only the Govan p*sscan kept the rags competitive and the rest were also-rans, but that's football for you!
The club would say it was FFP's fault that we didn't dominate but we spent plenty on average players, I think it was more to do with us wanting Pep so badly and waiting for him. He is (apparently) such good mates with Txiki that it was pretty certain he would manage us, but he wanted to first experience Munich which is fair enough. Pellegrini was only ever a stop-gap, and he knew it, so you could argue a league win and league cup under his stop-gap reign was not a bad return.
We've got Pep now, and OK it is a bit more of a building job than if he would have come three years ago, but the same players in the same positions would still need replacing anyway and it is a drastically different mentality and way of playing under Pep so still think there would have been a bedding in period.
So if you would have asked me back end of May 2012, with a stinking hangover from celebrating that Aguero moment every day for probably the whole summer, if I would have been happy with the trophy return up to now I would probably have said no, because we had the best team in the league and I only saw us getting stronger.
If, however, you would have also said "but in 2017 you will have the biggest (and arguably best) manager in world football, capable of transforming the club for the next decade, and play some electric stuff while you are at it even if there is a bit of a bedding in period" I would have bitten your hand off. Pep is capable of laying the foundation for how this club will play football forever, I'm pretty sure that is what our owners want, and if that meant a bit of short term pain for long term gain it is more than worth it.
If we aren't going in the right direction, why is it panic stations at the Swamp? Employing the most hated manager in football and trying to buy up all our scouts, just to try and keep up. So no point looking back now, the future is ours!