The lockdown is not a failure in Italy or elsewhere.
The messaging about the lockdowns were possibly unclear so people think that the lockdown will kill off the virus and we go back to normal.
That is not the purpose of the lockdown, it is merely to slow down the infection rate so that the pandemic will last much longer, but not as many people are sick at the same time and also buying time to build up more beds and hospitals.
If you look at any of the data, all the lockdowns do, and even publicly aim to do is to flatten the curve
and bring down the R0 value from 3-4 to something more manageable like 1.5 or so.
But still, since R0 is > 1.0 it will not slow down the growth. It will continue growing just at a slower rate.
So expect every day to have higher numbers than the day before.
If you just get a little higher numbers than the day before, then that is lockdown working. But the numbers will continue to grow until everyone has been infected.
If the numbers grow a massive 20% per day, then that is the lockdown not working.
Actual drop in numbers will not happen until so many people have already been infected and recovered, and are now immune, so that there is nowhere else for the virus to spread.
That probably, imho, is at least 6 months out IF the lockdown is hugely successful.
EDIT: To have the numbers drop means we need to get R0 to <1.0. No one expects that as far I can tell. They hope it will drop the R0 down to ~1.5 or so to bet breathing room to ramp up hospitals.
R0 indicates how contagious a disease is. Learn how it works and the R0 values for various diseases.
www.healthline.com
Flattening the curve. The area under the curve is still the same. 60-70% of the population.
It is just that the flatter curve has a much lower peak. But it also lasts 3-4 times as long.