The EU is one of the reasons that immigration into the UK has been so high (via Schengen) but the main reason for leaving was to reclaim full sovereignty. The Conservatives ended up with an 80-seat majority but sadly have both mismanaged the Brexit process and immigration, as well as losing their huge majority. Now Captain Cameron of the (SS EU) has returned as Foreign Secretary! This has all been so bad I have to wonder if it was all intentional.
Now the EU seems to be finally reversing its liberal immigration policy, which means there was a problem and that the UK was right to vote to leave in 2016.