The only real measure of success is "customer satisfaction", and I'd dare to say that the majority of the people of Sweden, UK and US are quite satisfied and some would have preferred even less measures to be taken...
Did that include the people who died ?
Just an anecdote, but I know far more people who are struggling with mental health problems as a direct consequence of covid lockdowns (myself included), and it seems practically impossible to get any reasonable mental health help any more. Even private services are overwhelmed. My partner works in the hospital and some days nearly all admissions are mental health, even during the peak of the second and third waves.
I certainly wouldn't have wanted a strict China-style internal lockdown, and the more porous western internal lockdowns didn't seem to make a huge difference anyway. If anything seems to have made a difference, it's travel bans and quarantine hotels (despite WHO claims). However, against Omicron, everything seems useless.
Focusing on Shanghai ignores the >1billion other people that strongly approve of Chinese policy and who saw firsthand how their quality of life was _preserved_.
They are simple not good enough to stop COVID, to do that the Chinese regime would have to choose an American vaccine.
Which they of course never will do, so one can ask if the Chinese regime really wants the best for their citizens ?