Someone made a comparison between UK and EU on democratic accountability: (as far as I can tell it's accurate)
In the UK, the system on the left is perceived to be democratic, the one on the right not so much.
On who pays the EU budget: there are currently 11 member states that are net contributors, the other 17 being eastern and southern Europe and Ireland. Per capita the UK is one of the lowest net contributors, it is however a big country so overall it is the second biggest contributor. Sweden has only been a member for about 20 years and has been a net contributor from the start.
It's a shame that people have just become more entrenched as Louis said. I was hoping the process of leaving would help people understand the EU better. Barnier said a couple of days ago that brexit will teach us (as in all Europeans) a lesson on what the customs union is, what the single market is, etc.. Sadly what he meant was translated into UK media as "EU will teach Britain a lesson" (even by the BBC).