It is sclerotic, opaque, elitist: different nations bound together by a centralised bureaucracy that ordinary people can neither understand nor vote out.
Not understanding something is not a good reason for abolishing something. Its a reason to encourage transparency and engagment with the public so that people do understand it.
Think about it for a second: You are advocating abolishing something, stating you don't understand what it does. What happens if you bulldoze a wall, not understanding that it holds up the ceiling? You should NEVER get rid of something without understanding the effect of that. You need to have a plan of what comes next, otherwise you set up political vacuums (which are very very dangerous and might result in something worse). This is where we went wrong in having the Referendum in the first place (there was no plan for leave), and when we went to war in Iraq (there was no plan for what to do next).
Time and time again you see this mistake come through; if there is no thought given to the replacement governance then you get issues. Ironically this is where we DID do well after WWII. There was a cohesive and comprehensive plan that was drawn up. (Parts of this were not nice as it involved carving up Europe into spheres of influence between the UK, US and USSR but there was planning into this PRE end of the war). There was no desire to repeat the post WW1 era and subsequent 1930s void and how it was exploited to create the circumstances that led to WWII in the first place.
Part of the problem here is that our politicians never bothered to learn what the EU is and does. Thats more down to laziness rather than ability. This has been highlighted explicitly by MPs not getting what the Single Market and the Customs Union are when ordinary business owners have managed and mastered this for years.
Had they done so, and not used ignorance as a political weapon for their own ends and empowered the public to understand not only the EU but our OWN democractic structures and institutions then power could have been held to account and we'd have a better criminal justice system, better services, less corruption etc.
People ARE NOT stupid. They ARE however, not minded to make the effort to understand these things. They want them to be simplified rather than them spend the time to learn things. Thats APATHY.
It is not beyond the capability of 'ordinary people'. Its beyond the political willingness of a section of the population.
Thats a very different beast.
Worse still, in many instances, what we are witnessing is a deliberate effort to try and misinform 'ordinary people'. Often ordinary people are well aware of this, but they would rather indulge this misinformation, because it fits with the world view they have and their personal grievances and prejudices.
So NO, I do NOT accept the EU is over complex and opaque and beyond the comprehension of the average UK citizen.
I think thats a conscious and deliberate choice by many UK citizens and politicians.
The alternative is that we accept that that UK citizens are somehow intellectually inferior to the citizens of the other 27 nations of the EU, who DO manage to understand how the EU works and what it does, much better than we do as a nation.