The governments and economies of Germany, Austria and Russia were utterly destroyed.
And guess what? That was almost entirely Internal. It had little to nothing to do with any fighting against them.
There were only two World Wars.
No, there have been at least a dozen.
The Seven Years' War was not a World War. It was a European War (primarily between Britain and France) over their colonial possessions.
Oh wow, how little you know history.
And no, it was not a European War, fought between the UK and France. Add into that mess Spain, Russia, Prussia, Portugal, the Mughal Empire, and Sweden. As well as multiple tribes of North American Indians.
And was fought on theaters in Europe, Asia, Africa, and both North and South America.
There was fighting all up and down the Americas, from modern day Canada to Brazil. And much of the Caribbean islands. Hell the UK conquered and occupied both Cuba and the Philippine Islands. Only returning it to Spain after the war in exchange for Florida. Even the Dutch who were officially Neutral tried to prevent the UK from fortifying India in the hopes they could take it themselves if they entered the war. Spain and France conducted a join invasion of Portugal.
It was such a major global war that there are many names for it, depending on where you are. In the US it is known as the "French and Indian Wars". To the French Canadians it was the War of the Conquest. To Sweden it is the Pomeranian War. In India, it is known as the Third Carnatic War. It has also been called the "Second Hundred Years War".
All you are doing here is showing that you really do not know history, and that you really need to learn more about it.
Yes, I define the terms I use. Why is that a problem for you?
Because your definitions are wrong, based on faulty knowledge. The very fact that you think it just involved the UK and France fighting over colonies shows how wrong that is.