EU citizen who lived in the UK and chose to leave the UK with Brexit, here.
I totally disagree.
In the EU Britain mainly blackmailed the rest with its veto - hence all the exceptions - mainly pushed for American levels of Capitalism and often even for American interests, and by the time of the Leave Vote it was basically a posh version of Orban's Hungary. Worse, in meanwhile it has only managed to become more right-wing that back then: the Brexit Tories weren't Far-Right enough for a significant proportion of Britons, so the extreme far-right ultra-nationalist Reform appeared and got more than 14% of the vote.
As for the rest, the main export of Britain was Financial Services, an almost purely rentierist business domain and were one of the most notable offers from Britain is International Tax Evasion services.
I can see why YOU as an EU citizen who chose to live there after Brexit would want to have Britain back in the EU: it would give you back in Britain a level of rights very close to those that native Britons have, making you way better than before.
What I don't see is what most people living in the EU right now would gain from Britain being an EU member, especially an EU member with privileges other countries do not have (i.e. the exceptions).
Personally, I think the only acceptable thing is more integration of the UK in the Single Market, NEVER Britain having a vote on the affairs of the 470 million people in the EU, much less a veto (which is what you get with EU membership), and even the Single Market integration has to be limited since even back when it was an EU member Britain was known for willingly (in that it's authorities couldn't care less as long as those products did not end up in the British market) being a massive backdoor for illegally bringing non-compliant products into the Single Market.
Fortunately, when Britain swerved towards Fascism, it actually left the EU so the harm it could do to the other 470 million EU citizens was limited, but as Hungary showed, if such a country slipping towards Fascism does not chose to leave the EU, it's almost impossible to deal with, so it would be an incredibly bad idea to make an EU member of a country which is now even more far-right than at the time of Brexit, even if with the most basic, zero exceptions, membership.