Defending in the EPL has been on a downward slope for the past few years to be honest. Gone are the days when the Everton's, Newcastle's and Aston Villa's would hold star studded United and Chelsea sides to a tough 1-0 win. Whats even more apparent is the drop in the quality of the top teams defending. 3-4 years ago the likes of Liverpool, Chelsea and United's defenses were one of the best in Europe, right now, they're a complete joke.
That being said, i still think the level of defending is not as bad as the Liga. However as a league the Liga is now miles ahead of the EPL, been saying that since last year to be honest. Teams like Chelsea and Arsenal are a joke nowadays, i'd say the likes of Malaga and Atletico are better teams to be honest.