Speaking as someone who lived in pre EU Britain...
When we had the original referendum it was to join the EU, which at that time meant Economic Union, i.e. the common market, it was a union designed to allow free trade between the countries who became members.
Even then Heath was only offered a watered down deal as both Germany and France had strong objections to our membership.
(There's gratitude after bailing one out by freeing it from its enemies in two world wars and beating the other in two world wars and helping it rebuild)
The problem is that the EU has gone on to become a political monster, make no bones about it the EU wants complete dictatorial control over every aspect of our lives, the edicts and diktats that are forced upon us every year are beyond a joke, made worse by the fact that France and Germany still try to penalise the UK at any opportunity.
The worst problem is that we have already lost control of our borders and future plans are that the EU will have direct control over all borders.
Everyday we hear of cases of criminals coming into the UK without hinderance as we have to allow free access to any EU citizen, we aren't allowed to check who's coming in and as a result have had numerous murderers and rapists, not to mention gangsters and other criminals. we now have the situation where EU citizens are trafficking in many young and underage girls, forcing them into a life of prostitution, and this is not just in one area but every large town or city in the country.
Such things are just unacceptable.
Just the same with the army, the EU already has plans drawn up for an EU army that will replace all state armies under the direct control of Brussels, not the member states.
It all adds up to the fact that the individual states sovereignty will cease to exist, all decisions will come from Brussels' unelected dictators.
We will be walking into even more of an Orwellian nightmare than we already live in and if you think things are being made uncomfortable for Christians now, well the future will be even worse!
Personally I've had enough of the weak willed liberal wets we have in charge here who bend over backwards to apologise for our countries values and heritage whilst ignoring the majority of the population and almost deifying the minority groups.
Finally the country was fine before the EU, we where prosperous, other nations wanted to trade with us and our economy was fine.
The only difference now is that we have to get over the idea we are a world power to be reckoned with, thats no longer the case, but we are still an island nation that can stand on its own two feet if need be, the British spirit is still there, its just buried under a mountain of political correctness and Brussels diktats.