I've forgotten more about serie a then you wille ever know. You just act like an authority cos lived there or whatever
I don't actually think there's a lot in it across the top 4 or 5 european leagues.
I looked at it statistically a year or so ago.... taking the amount of different league winners in each of the last 10 years, all the leagues were similar (in fact England had a slight lead i think). Same with runners up. Obviously if you only go back 7/8 years or so, then the recent dominance of teams like PSG/Bayern/Juve pushes the balance even further in England's favour.
However England was lagging a little behind in terms of different top 4 teams in the last decade, which points to other leagues being a little more competitive in depth than "we" like to think.
Of course strength is more subjective.... and of course the top 4 teams in other big leagues have not always got the benefit of champions league money, which again helps England.... and of course none of the above accounts for teams in the bottom half.
I just did it to counter an argument elsewhere that "Premier League is the most competitive and thats that" just because that gets peddled on Sky Sports.
However on the other hand it would be foolish to ignore the amount of money floating round the premier league which probably makes it slightly the strongest at the moment... but the gap isn't huge at all.