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.
The question is not who is a bigger club overall, Barcelona is obviously a bigger club. The question is which club has been more successful in the past 10 years. I know the more successful club is Barcelona, but you'd be surprised at the amount of fans that'll pick Liverpool.
This is because of hat Barcelona has done in the past 10 years looks like child's play compared to what they used to be but if any other team achieved that, the club would be applauded, that's why I used Liverpool.
Fair enough because your judgement is based on the past 10 years, but come to think of it, how many trophies has Liverpool been able to achieve as to measure with Barcelona? Even in the past 10 years, FC Barcelona has won more trophies than Barcelona so I think you didn't make your research correctly.
When you say Barcelona achievement in the past 10 years looks childish I don't actually understand what you mean by that because if I start listing the various trophies they've achieved in the past 10 years, you would be marvelled because they are too many ranging from Champions league, la Liga, super cup, Copa del Rey, like it's plenty enough and Liverpool in the past 10 years haven't been able to achieve half of the milestone Barcelona have in the past 10 years. Every one is at liberty to choose any team they prefer but I tell you that there is no comparison between Barcelona and Liverpool.