I think what
@Bepi was trying to say is that when other leagues have been strong i.e. Italy and Spain their dominance has been reflected by international football success.
This was a badly flawed point because whilst it works for the recent Spanish side it does not work for Italy. In 1982 Italy was the 14th ranked league in Europe by club performance! Roma were knocked out in the second round of the CWC by Porto. Napoli were knocked out in the first round of the UEFA Cup by Radnicki Nis and Juventus were knocked out in the second round of the European Cup by Anderlecht. Italian sides were completely rubbish in Europe that season but went on to win the World Cup. In 2006 Italy was the third ranked league in Europe. In 2020 Italy was the third ranked league. When Italy actually had the best league they didn't win any international titles. Bepi's workaround for this was a laughable one where he lauded 'deep runs' in competitions as a measure of success by Italy at that time, like the time they lost a major international final on penalties (sound familiar?). Essentially shifting the goalposts to unwittingly defeat his own point!
The basic logical flaw in this line of argument is that the narrative is completely reversed if England would've won a penalty shootout. It has no basis in common sense. If you want to make a 'you're first or last' argument then fine but I think it's stupid.
If what you're trying to say is that England are undermined by not having a high concentration of players in a small number of teams (meaning that they don't play together often enough) like Spain recently and Germany then that's a point I think that's more credible. That said, the last time the English league was very strong England did have most of it's best players concentrated in 3 sides but the international performances were poor.
I think Bepi's point was more that England don't have enough players playing at a high level in European club football though. Again a poor argument. Before Euro 2020 James, Mount, Chilwell, Walker, Foden, Stones, Sterling, Shaw, Rashford and Maguire (I include Maguire because he would've played if it weren't for an injury) played in one of the two major European club finals.
That takes us back to proving bepi's original point wrong. Given the prevalence of English players competing at the highest level of European club football a 'deep run' for the England national team at Euro 2020 wasn't a surprise.