By the time we got around to implementing it enough old people had died off that the vote would have gone the other way already.
Like when people are against a president if the economy isn't doing well, regardless of if the alternative candidate would've been better.
This also isn't an issue thats being campaigned on. If there was another vote to join the EU, and people got flooded with anti-eu messaging specifically targeted at the demographic, I'd bet that number would drop.
The UK just keeps kicking young people down. The boomers voting against our interests are whipping us into working to pay for their triple locked pensions.
Unfortunately the UK has a voting cohort that is both large and willing to screw over subsequent generations.
It's truly a crown in the gutter moment where you can be completely off-the-wall nuts (vide AfD) and, if you're just willing to campaign on anti-immigration, your ranks will instantly swell. Yet the establishment is somehow completely incapable or unwilling to capitalize/capture this.
I personally was very pro-EU in my youth and deeply soured as I knew more and more to the point I'm staunchly against nowadays.
It started in 2005 with the referendum result being ignored. Then 2012 came with the shambolic management of the Greek crisis, something even the IMF points as ineffective. Then I was paid to put in place the Green Taxonomy and I saw how unready and dumb the whole thing was. Then there was the rejection of the Draghi report which made lose hope.
I find the mix of the euro being a deeply unfair currency union strongly advantaging Germany at the expense of the periphery, the fact that Germany keeps playing on it and amplifying the effect in direct violation of the treaty and yet always get a hall pass and their holier than though attitude despite being basically free loaders completely impossible to tolerate.
The 2019 CEP study showed it well. The union costs billions of GDP to France and Italy to give a minor advantage to the German. It's a dogmatic straight jacket managed by priests with zero actual economic understanding and serving the interests of a big mercantilist using development funds to shore up its tributaries in the east and still managing to gradually lose relevance as it can't even manage having a proper strategy despite the advantages, and a few fiscal parasites around it.
At 36, I deeply wish from my country to be free of the monster than the union has become and deeply ressent being a prisoner of a monetary union which intentionally didn't plan an exit path. And for what? Surrendering the ability to make law to the citizen of other countries who share neither my language, nor my culture, clearly don't have the same vision of the future than us and wants to force us into their ineffective model? No, thanks. No GDP gains or alleged diplomatic weight is worth this debasement.
I don't understand Brexiters because being out of the euros they had the best of both worlds but I respect their desire to be truly sovereign and free from the constant Germanic hegemonic push.
Edit:Lots of downvotes, very few counterarguments. I'm guessing facing the tensions at the heart of the project makes some of you frankly uncomfortable.
Also young people always blame last gen for whatever, so expects -8 ~ 0 years old would vote for exit again…