Agree it's awful needing on off, on off, dragged out lockdowns. The sensible solution would be a belated Australia and New Zealand approach. So that we aren't in this same shit position two months from now. Yes we won't be in as good a position as them, because we left it so late but it's definitely better than alternative (ongoing crap all round with health at risk AND the economy so badly damaged).
So, if we really wanted to prevent further shittyness, and a semblance of normality before Christmas, we do 1-2 months proper (Spain, Italy, France etc style) lockdown now. With closed borders for up to one year (excepting essential travel - freight etc).
Proper hotel quarantine for essential travellers.
In 1-2 months time we could open up back to relative normality. Unfortunately I don't expect us to have enough sense and foresight (even now) to take this approach.
Sweden? Can we manage it immediately? Massively increased housing? (50% of Swedish households are single occupancy). The lack of overcrowding would certainly help limit the spread. I'd also welcome an excellent well funded healthcare system. Can we get the NHS to Swedish standard's overnight? If yes, let's do it.