The point has been that the directives coming out of Brussels are not laws but the similar of a U.S. executive order with the same hierarchical status of a law, if not automatically superseding national law. As such, they do not express the will of the people but of a ruling class not subject to checks and balances.
As a former German citizen, I think it would be good for Germany to undergo a Dexit, France a Frexit, and so forth. The EU, while making intramural travel smooth and convenient, has largely absorbed the sovereignty of the German people, which it’s 1949 constitution had reserved for themselves.