It's up to personal opinion. Like I said, sometimes there are people who only look at the losses/ negative facts. How about the 2014-15 cl win? If we lack effort at winning it, what happened when we're full effort? That's why I said, don't generalized. If we're so bad that there's no title, domestic and international for, let's say, 2 or 3 years, you can shit the boards and players and coaches all you want.
Do you want to say that it's better to lose at semis or finals ? At the end of the day, there's still no title. Not much of a difference.
The losses were indeed painful, but a 1-2 loss at the end is the same with 4-0 loss. (Don't forget we came back sentationally after PSG. Lack of effort?).
The point is, we failed to win it. People, in general will see it like that.
If not, then why would anyone pissed of Messi not getting his country a medal in those three years for argentina despite the fact that they didn't lose a single game in a 90 minute of play and played the maximum number of matches possible?
Back to Barca, indeed that a better management, after learning from years and years, should be the priority. We learned that the collapse is usually around first and second knock out stages of CL, so learn from it. Learn from Rome, Madrid. But people shouldn't be complaining when we win CL despite losing in league and cup. I once said, it could be some kind of pressure or ambition from a new coach like EV, having a chance to grab the treble, something that is rare, to a greater extent, doing it in his first year as a coach. And somehow failed. He should learn a thing or two next year. Also we would have some more interesting option, despite losing Iniesta.