Brexit votes were motivated by Sovreignty, Immigration, Cultural and Anti-Establishment concerns. http://csi.nuff.ox.ac.uk/?p=1153
Here are some reasons for the referendum result:
"The Auditors conclude that the EU commission must work more closely with the people for decisions". It isn't a priority, the headline on Europa.eu was removed after one day. EU plebiscite-aversion is the root of Brexit.
The EU commission doesn't enshrine "pilot schemes" to test laws, nor "citizen commissions/committees" to research them. The EU isn't a "direct democracy" and does not enshrine "direct plebiscite representation" as one of it's goals. It is an "politician's democracy" (archaic democracy)
The results of a commoner-averse commission:
The EURO Currency:
500 notes are a mafia dream, and mostly used for illegal trade... 500 notes were erased after 20 years of criminal use. US/UK/Japan don't have 500 notes for a reason, not even 200 notes. 500 note folly is an EU symbol of political meddling in academic planning and failed policy. https://www.euronews.com/2019/01/28/cash-out-eurozone-banks-stop-issuing-500-note-in-fight-against-crime
The Euro coins were a hurried and impatient project... no pilot schemes, no popular endorsement, like the NZ flag competition, they are locally unpopular and confusing for color blind users (5% of the population). (identical brass colors, identical round shapes. People even confuse the 1 and 2 euro coins after a long day because they look identical except for the size). https://science.slashdot.org/story/02/07/11/1352234/euro-coins-test-for-color-blindness I'll do a test on the street to see which french people say "they franc was worse! (0%).
The Common agricultural policy was improperly planned, encouraging set-aside land instead of chemical-free land. farmers were paid for growing nothing. The 30 billion spent on the CAP was highly contentius and has had many reforms. https://www.lexisnexis.com/legalnewsroom/environmental/b/environmentalregulation/posts/the-european-union-39-s-common-agricultural-policy
The cookie consent policy was incompletely planned, consent forms are unformatted, it risks viruses via form-fatigue. https://security.stackexchange.com/questions/192943/are-eu-cookie-consent-forms-safe
The macro-economic policy was badly policed(unlimited lending): private German banks lend Greeks, Spanish 150 billion. https://www.thelocal.de/20180621/germany-made-billions-on-greeces-debt-crisis-berlin-confirms
Ebike law, a green law, rated ebikes lower than all other regions of the planet, less than Japan, India, USA, Canada, Switzerland. 250w is fine for Brussels, which is flat. Countries like Belgium have added stronger ebike legislation for S-Pedelecs, while S-Pedelecs are illegal in the French/Italian/Austrian Alps, the Pyrenees, Scotland. https://en.wikipedia.org/wiki/Electric_bicycle_laws#Europe
Politicians have radicalized the people, by refusing to cooperate for popular consencus. The UK govt asked for unrestricted market with restricted migration, and the EU refused from the start. The rest of the negotiation was negative.
My the way, I am a centrist French and Scottish-English brexiteer: pro-single-market / anti-single-citizenship. I have respect for Ireland and their ancient border. I also respect a lot of fresh thinking that the EU has brought to the UK.
The base premise for the EURO has been mitigated by the internet: instant digital translation of language and currency-font-conversion... withdrawal using credit cards, The EURO needn't be physical. The computers can make a virtual EURO without needing a physical one! I personally loved the experience of foreign currencies, Francs, Lira, Drachma. Who would to travel everywhere without a credit card? https://www.pymnts.com/news/cross-border-commerce/2016/internet-cross-border-trade/
The military premise for the EU is obsolete, from a world of printed press with black-and-white TV, independent from NATO (1949), predating nuclear deterrence (1950), predating the internet(1995), predating digital culture. https://en.wikipedia.org/wiki/NATO
The EU doesn't tax chemical foods or subsidize natural foods because of lobbies.
The EU doesn't tax plastic use for packaging because of lobbies.
The EU doesn't tax immoral foods like foreign coffee, tea, bananas, to develop exploited nations, because of lobbies.
EU institutions employ 4300 translators and 800 interpreters as full-time workers. The constitution is written in three official languages, German, French, English, which are translated for negotiation, like Chinese whispers. Imagine that US law had to to be translated from German and french to English sentence by sentence by very bored translators, and back again, only for the drafting, let alone the final result? it would be much less efficient. (This is translated from german: https://www.epo.org/law-practice/legal-texts/html/epc/2016/e/ma3.html)
The cultural ideals of the EU date from the 60's and they are controversial: multi-culture society does not simplify society. Why unrestricted society's complexity?
Jews took 1800 years to avoid EU integration, resulting in Hitlers racial policy... Cultures do not assimilate, so what will be the utopia result of inviting 100 million Muslims to Europe? Are you sure that your children will not regret the decisions you make today, that their cities will feel home to them as they did to you, will your children feel alienated in their own country? perhaps, yes. http://news.bbc.co.uk/2/hi/programmes/happiness_formula/5012478.stm
The EU has relegated world development and green issues far below it's own prosperity, https://www.sciencedirect.com/science/article/pii/S0048969718343420
as evidenced by the lack of tax on plastic, tea, coffee, bananas, and other world-devastating goods.
Bhutan, Norway, Sweden, and isolated nations are often the kindest and most peaceful nations, like a village far from a main road... Trade-routes tend to be complicated, segregated, violent... Mohammad came from a trade-route culture, Buddha was from Nepal, nations like Syria, Guatemala, North Korea, Iran, have more border movement and are naturally more violent.
Borders of military transgression, like Northern Ireland, occupy the same footing in EU law as Physical borders, like the Alps, The channel, The Pyrenees.