It's a cyclical thing, isn't it.
Mid-to-Late 00s, the Premier League was all conquering, and the teams barely lost to anyone not named Barcelona.
Then they went through a bad patch, where all of the 'big' clubs went through some managerial or squad turmoil simultaneously and they ceased to be competitive on the CL stage for a few years (as much as it was the greatest Premier League season for me, by far, Leicester are never winning the title in a year when any of the richest clubs have their act together...…)
Now the new Sky TV deal has kicked in, some of the best managers in the world have signed on, and the Premier League is back to dominating.