I don't think, that is a fair description. Many critical decisions by design require unanimous consent (in the European Commission). So you need their vote on things, unless you suspend their voting rights. That in turn requires unanimous consent (excluding the accused) But it is clear, that other members of the Visegrád Group will block that.
Also, not sure how a strong leadership in the EU could (or should) change the effects in a state.
Personally, I think, they should have made the Brexit much smoother, so that other countries cannot make the EU the scapegoat.