6.6% is not totally disastrous overall (all things considered). Most of the EU and UK are heading for 8-11% contractions. I think China's GDP is forecasted to increase 1-2% this year.
Not really surprising considering the US has had a much shorter and milder lockdown than almost anywhere else with significant COVID19 outbreaks.
While much of Europe now have COVID19 in massive decline, it has been nothing but upwards and onwards as far as America is concerned, so that lower economic decline came with a steep cost in human lives and misery.
I think much of Europe is re-opening too early and too quickly, so will likely suffer second waves and potentially have to reinstate partial or even full national lock downs again, while if the US just ploughs ahead without much concern for the lives and wellbeing of its citizens as it has done, the US is likely to do better than Europe economically for the rest of the year barring significant new developments like a vaccine or a truly horrific level of massed fatalities in the US that even Trump cannot afford to ignore.
But the best approach is to follow the Chinese example and go early and go hard so that the outbreak is totally eradicated before re-opening, such that you are not then just lighting the fuse on a time bomb, and can focus the majority of your efforts on making sure all imported cases are properly handled to avoid any uncontrolled outbreak.
And before the usual suspects drag out their standard issue party line BS about it not possible in ‘democracies’, they need only look at Taiwan and South Korea. If they are going to be racist about it, they can even pick New Zealand, with is democratic and white.