@Woj the problem with the campaigns of both sides was twofold.
Firstly, in any decision there are upsides and downsides. Thus, I would have expected the remain campaign to have made statements along the lines that the benefits of remaining are this, the benefits of leaving are that, the downsides of remaining are this, the downside of leaving are that, and on balance remaining will be more beneficial because of whatever reasons. Similar for leave. None of that happened, and both side just said "it will be shit if we do the other" in the main.
Secondly, the stupidity of the electorate in not doing their own research on a complicated issue. There was one version of remain, and that was to keep what we had. There were a million permutations of leave. Take immigration as one factor. The UK had one of the lowest rates of acceptance in the EU, and there was more that could have been done to lower that further even under EU rules. Our government elected not to exercise any of that. So to vote to leave based on immigration is like saying "you aren't doing a good enough job, so I am going to free you up to do a worse job", and this is exactly what happened. The Conservatives opened the door to more migrants, and lost the support of the other EU countries, the most important of which was France for obvious reasons.
Only last night I had a conversation with a friend who voted leave whose comment was "this isn't the Brexit I voted for" and got most upset when I pointed out that it absolutely was. The voting was in or out. We are out. He got what he voted for. There was no sub box that said "I vote out in order to get X, Y, or Z". There must be tons of disenfranchised leavers for this reason.
I voted remain, I also agree with PP that we are unlikely to ever have the same terms should we try to rejoin, and I agree that our efforts would be better deployed elsewhere.
I also think that the standard of politicians in this country has dropped through the floor, so I don't currently see anyone capable of negotiating rejoining. Most of the can't run a bath, let alone a country.
Then there was Covid, Ukraine, Gaza, Iran and it all compounds. Our economy has lost billions. I worked in financial services and most of the investment houses moved thousands of people abroad to minimise the risk after the referendum result. Because that's what they do. They manage risk. They didn't know what the deal would be.
What am I doing about it? Fortunately, I have the ability to apply for citizenship in an EU country, so I am doing that in order to be able to travel, and potentially work in an EU country as that is where my job moved to. I may even move to one if it gets worse here. Despite the higher rates of tax.
Actually tax is another thing that makes it worse here and more difficult to recover from leaving. The UK electorate seem to want a champagne service for lemonade money. We have one of the lowest rates of tax, but want fabulous public service. It is beyond stupid. Until that all changes, we are pretty fucked here.