The vaccine rollout, economic growth predicted to be fastest in 70 years to name two.
As an ordinary British citizen I've felt no negatives from Brexit...
But then again I look for the positives in life =)
Vaccine rollout: done when we were still effectively in the EU, using UK-EU research, investment and manufacturing collaboration. All EU countries (including us) had option to either go as a group or individual states could go it alone. The rollout is a tremendous success but completely independent of Brexit. Of note though, Brexit has caused us the loss of the European Medical Agency, which was in the UK.
On a side note: some EU countries seem to have huge problems with Anti-Vax sentiment (largely driven by on-line misinformation): my brother's french other half says almost none of her relatives are taking them, and they're not alone by any means. I find that incredible, esp for a nation that so values and respects its own health service.
Growth is a direct result of clawing back some of the ground lost from the biggest recession in 300 years. If we end up with a more solid recovery than the leading EU countries in, say, 3-4 years, then yes, I'd say Brexit will have been a success.
So far I've found a lot of the people that are saying 'it's not affected me' are the retired, with triple lock state + final salary pensions and are mortgage free. This may change when EU travel starts to open up, although I'm sure steps will be put into place to smooth this. I hope so: as it stands historic motorsport (Spa, Le Mans Classic, Angouleme) looks to have all sorts of customs issues.
Now, I'd be a lot less sore if we'd got the Brexit that was being sold in 2016, and completely understand why people were tempted to vote that way: people sold the vision of friction free access to the single market / custom union but with many of the percieved benefits of more independence. Lots of people were getting a terrible deal from society and thought / were told a Brexit vote would right many of the wrongs. I get that.
We've ended up with about as hard a Brexit you can get without an outright no deal, Scotland right on the edge of leaving, Ireland heading towards heaven knows what and a general flag-waving, Little Englander outlook where populism rules all. I find it very hard indeed to understand how huge swathes of the country think this is not only acceptable, but that it's to be applauded. I would submit that the numbers of winners both here and in the EU does not outweigh the number of losers.