Erm, right now the results of PL clubs in Europe speak for themselves.
Every single English club competing in the CL topped its group, Liverpool won 6/6 including 4 games against Atletico and Milan. Both English teams in the EL also topped their group. We were the only English team (all the way down in the conference..) who don't occupy first spot in our group.
So it's more an us being shit thing, the Premier League is very clearly #1. It hasn't always been (was a period when La Liga was easily on top and Prem fans/the media acted otherwise) but currently it's by far the strongest league.