I think it boils down to the standard of the club. Many football fans will not admit it but Barcelona is among the top 3 biggest clubs in the world. When a club as big as Barcelona has a little failure, it would be viewed as a very huge one meanwhile this is what other teams get a pass for.
Let's put what I mean practically. If you ask any football fan to choose which club has been more successful in the past 10 years between Liverpool and Barcelona, most of them will say it's Liverpool, but are they?
Liverpool has the Champions League in the last 10 years, and Barcelona also has won 1 Champions League in the past 10 years.
In total, Barcelona has won 16 trophies since 2015 while Liverpool has won 7 but because of the standards of Barcelona, this is considered poor. It's the price for greatness, I understand.
I like the way you analyze the whole issues in your comments but I will also like to know the other two clubs alongside Barcelona as the biggest clubs and the basis in which you rate them. Moreover, I don't think any sane and experienced football fan would rate Liverpool ahead of Barcelona despite the recent challenges they are experiencing. Actually, Barcelona performance has depreciate but not to the extent people are assuming it. As you pointed out earlier in your comments is exactly what I noticed too. The reason their poor performance is noticed and being talked about is because of their standard and of course, expectation from them is beyond imagination. Considering the squads that made up the current Barcelona team, one can not expect too much from them as everyone is doing right now. These boys are too young to be mounted with much pressure to play extraordinarily.
I see no reason why Liverpool should be rated above Barcelona like I don't understand the aspects of the ratings because if we check from league titles, Barcelona have won a record of 27 la Liga trophies and 5 champions league cup to their name whereas Liverpool have won 19 premier league trophy and 6 Champions league victory so with this statistics, you can differentiate between the both clubs and however, if not that Barcelona seems to have reduced in their performance after Lionel Messi's exit from the club you could have agreed with me that Barcelona is far from being compared with Liverpool.
Well said about the ability of the current squad of Barcelona to match up with the quality and energy between those past squad of Barcelona because in those years, any team that meets Barcelona will actually know that they are playing with world class team but currently now the players though I wouldn't say they are too young because they can still achieve outstanding performance regardless of their young age but I feel their experiences are very little and will take time before they can build up Barcelona to that standard again but however, the club needs new quality signings of which they ain't too financially stable to meet up with purchasing some set of quality players.