Both Germany and Spain have better leagues than here.
If you consider the potential for any team to beat any other then Holland, Italy and France are all similar.
If you dont think there is a huge gulf between the top 6 in this league and the other 14 then you're not paying attention (odd aberration of a result aside)
A good indicator of how good a depth a league has is looking at the Europa league. The only time England does well in that is when some of our top 6/champs league teams find themselves in it.