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Looking back with what they have achieved, it is right that Manchester City is considered the best team in the Premier League. Looking back further, it cannot be justified because Manchester City at that time was still not considered the best team. I think you understand.
Since Pep Guardiola came to Manchester City as a coach, they have established their status as the best team in the Premier League. Even Pep Guardiola has carved a new history for the Premier League where so far only Manchester City has managed to win 4 consecutive titles, they are the only one.
In the past, Manchester City have not been a consistent team with their performances and they are not the big team that can be expected. This is the 23rd consecutive season for Manchester City to be in the Premier League since being promoted in the 2002-03 season. Manchester City needed 10 seasons since being promoted to win their first title, when Roberto Mancini was their manager. Manuel Pellegrini won it again in the 2013-14 season, but he failed in the following seasons until Pep Guardiola was appointed in the 2016-17 season.
There is a lot of history about this club that you can read, especially here:
https://www.transfermarkt.com/manchester-city/platzierungen/verein/281~Snip
Until last week, yes, I would also say Manchester City is the best team among other teams, but if you look at this season it has been 5 weeks and there are still many matches to be played, I think it is still too early because Liverpool and Arsenal also have the opportunity to be at the top. Chelsea should not be ignored either.
If Klopp had not won the title in the 2019-2020 season, then today Manchester City would be the team that has won 7 titles in 7 consecutive seasons. Fortunately Liverpool were able to stop Manchester City's dominance that season, but Manchester City re-established themselves as the best team.