Hold on a minute. The EU didn't "introduce" anything. We were willing members of a club. The club, us included, agreed to raise it's game by improving the standard of activities in many areas. Many of those standards came from us (as we had them first) and with newer ones we took part in committees to agree them.
As an EU member we both contributed and received. It was a beneficial arrangement on most levels.
Unfortunately successive, spineless UK politicians used the EU to mask their own agendas, incompetence and failings. The EU became the whipping boy over the channel.
Other countries, particularly our commercial rivals, Germany, France and Italy had no issues in (appearing to )comply to the club rules.
The UK has suckered itself into leaving this club; and as yet NO benefits of leaving have been demonstrated.
If we had had the political leaders we deserve, they would have leveraged our financial contribution better; and we should have stayed in, reaping the benefits of what we had sown over 40 years.