City have KDB who's an all time great(will be considered one when he retires and has nostalgia-bias in his favour) and one of the toughest midfielders to stop(Goals and Assists galore unlike Iniesta who depends on Messi and Xavi for the end product). City have Haaland, one of the biggest goal threats ever. They also have the best DM on the planet Rodri, best defensive RB on the planet Walker, one of the best technicians in Bernardo and other brilliant players like Foden, Alvarez, Ederson.
Plus Pep is older, wiser and more experienced now.
People forget that the teams Prime Barca was competing against weren't the best. Man Utd were declining after losing Ronaldo and ageing star players and manager. Bayern demolished Barca when they faced them. Madrid was a great team and Barca were exceptional against them. Juventus weren't at their very best. Chelsea won the semis against Barca and were robbed by the refs in 2009. The other Italian teams and Prem teams were weak.
People say the level of today's Football is shit. But the opponents Prime Barca faced were also shit except Madrid and Bayern who destroyed Barca. United were good but not great. Chelsea were good and defeated Barca in 2012 and were robbed in 2009.
Where's this narrative coming from? Nostalgia. People shitting on today's Football because they miss when their teams were great.
You are getting into discussions that make you look silly.
The thing is very few teams playing in an elite league manage to win 3 league titles and 2 champions league titles in 3 seasons. Even among the top ones, this type of excellence is only reserved for the best of the best.
Out of those, even fewer manage to assemble a team consisting of not one, not two, but three all time great players playing at their peaks. Including what many consider the best player of all time, and the best central midfielder of all time.
Out of those, even fewer have a legendary tactician leading them.
Out of those, even fewer have several key players that formed the backbone of their national team, a national team that won 2 Euro titles and 1 World Cup title in 6 years. So every major international tournament for 6 years straight.
On top of those, you also add the playing style that led to total domination on the field.
That team is nearly untouchable. Even 1-2 of those factors are hard to get in the same team, let alone 5-6.
Liverpool didn't even break the 1st level. They didn't even manage to establish domination internally, over their domestic rival of the time. It's silly to compare them to the best of the best.
Liverpool are an elite current team with an elite manager, that's it. But they won 1 league title and 1 champions league title in like 7 years. Finished many times in 2nd, both in England vs City, and in Europe vs a not so great version of Real Madrid.
Just one example why your arguments are not very good.
You say United were declining after losing Ronaldo. True, their 2011 team was not as great as their 2009 side. But still a better team than Tottenham in 2019. And yet, Barca pulverized Manchester United, 19-4 (12-1) in shots, while Liverpool defended a 1-0 lead vs Tottenham in 2019 for large spells of the game. Compare the performances. 12-1 in shots on target, vs 3-8. One was a masterclass in dominating your opponent, the other a close game won by the more efficient team on the night. City's game vs Inter was similar from last year.
Also, you got your Bayern games wrong. Pep's Barca destroyed Bayern 4-0 inside 30 mins on Camp Nou. Bayern beat the post-Pep Barcelona version whose manager was dealing with cancer at the time.