Europe and Antarctica are the only two continents on Earth to see no net positive growth to their economies in the last few decades.

Hmm...the numbers appear to disagree with your claim:

  http://www.tradingeconomics.com/european-union/gdp-annual-growth-rate

Hmm...the article does not say that China is the source of the ratings: "compiled by Portland, a London-based PR firm".

Let me repeat that: a London-based PR firm rates Britain highly. In other news, the pope says vatican tops in catholicism and the US president thinks US is the greatest.

In addition, "Britain scored highly in its “engagement” with the world, [..] its diplomats staffing the largest number of permanent missions to multilateral organisations".

Hmm...

And finally: "But many of the assets that pushed Britain to the top of the soft-power table are in play. In the next couple of years the country faces a referendum on its membership of the EU; a slimmer role for the BBC, its prolific public broadcaster; and a continuing squeeze on immigration, which has already made its universities less attractive to foreign students. Much of Britain’s hard power was long ago given up. Its soft power endures—for now."

Gee...