You can't just will positivity into existence.
Unfortunately... since - as these threads show - Brexit has driven a very, very deep wedge into British society and created/exacerbated tensions that will take a very long time to heal.
The things that matter to many are irrelevant to many others.
That's clear from the remarks on travel here: it is now far harder for young people to travel to EU countries to gain work experience and language skills. Sure, there are other places they can go, but most are far away, expensive and more complex to work/study in than EU countries were.
However, if you're not concerned about that because you/those around you won't be affected, chances are that will make it easier to dismiss others' clear sense of lost opportunities. Particularly if travel is synonymous with tourism in your eyes, rather than with study/apprenticeships/internships/research/work opportunities, which others may be referring to.
My sibling's personal life is being rent asunder by the rules on 90/180 days, while they also struggle to save a successful professional activity, painstakingly built up over several decades.
Maybe they should just get a new life partner, change jobs (because, like, that's easy...) and move on in merry positivity - but that isn't quite as easy to do as it is to write.
I can also see very clearly how badly the UK's reputation has been damaged internationally by Brexit and successive governments' handling of it. That won't blight my days forever more, but it does sadden me, partly because loss of goodwill from your nearest neighbours is never a good thing, but also because I can't yet see any positive outcomes that might make any of this worthwhile.