Make up? It's actually rather easy to google this info(which you can).
There has been a report consistently published every year on this subject. The current one, ranked for the summary of last year, should be released shortly, but The Economist Intelligence Unit's Index of Indexes ranking, which also includes safest places to live(which we rank No. 8 in the world, and No. 1 for North America), has us as the best overall city to live across the major index categories.
Zurich and Geneva are not ranking cities, but the rest you mentioned are, but in the Most Livable Cities portion of the Index. Where Toronto currently ranks No. 4 behind Vancouver, because of their score on the weather quality portion of the livability aspect. It's kind of neat though that 3 of the Top 5 cities are Canadian(us, Vancity and Calgary), and Australia and Canada collectively hold 7 of the Top 10 spots in the livability index ranking.
Okay let's take a look at the three biggest "quality of life" ratings for cities published:
Economist (most liveable):
Melbourne
Vienna
Vancouver
Toronto
Calgary
Adelaide
Perth
Auckland
Helsinki
Hamburg
and that's the average score among multiple categories. So not sure what you're arguing here. Are you saying all other cities score much worse in other rankings and that's why Toronto is the world's best? Because they're not. Comparing subcategories amongst the top10 cities, Toronto ranks T1st (with 3 others), T1st (with8 others), 2nd (behind Vancouver) T1st (with 8 others) and 10th (behind 9everyone else)
so by what logic is Toronto the clear ranked 1st? even if you just completely ignore one of the categories (that conveniently Toronto scores worst in), Toronto and Vancouver still tie with 2-1-1-1 ranks)
How about comparing it to other big studies?
Monocle's Quality of Life Survey:
Tokyo
Berlin
Vienna
Copenhagen
Munich
Melbourne
Fukuoka
Sydney
Kyoto
Stockholm
Vancouver
Helsinki
the top12, with Toronto not in the top25. I've bolded the ones that also appeared in the Economist's.
Don't like Monocle's? Okay, then by far the other biggest one next to Economist is Mercer's:
Vienna
Zurich
Auckland
Munich
Vancouver
Dusseldorf
Frankfurt
Geneva
Copenhagen
Sydney
(Toronto comes in at 15th here)
Just looking at these lists, a few obvious cities come in higher than Toronto routinely. The stand-out candidate being Vienna, but so do Vancouver, Auckland, Munich, and Sydney.
Overall? I'd say Toronto is a solid top10 in the world city when you compare them among all categories and multiple rankings. Do they lead in some categories? Sure.
But saying "the best overall city to live across the major index categories." makes no sense when the economist's ranking you quote has them at 4th and no other ranking even has them in the top10. which also invalidates "we are the only city in the world that consistently ranks within the Top 5-10 range of major standard of life quality indexes."
so.... be happy it's a top10 city but don't make up statistics.
I pulled all these numbers from the 2016 reports but you can also check out this link for an easy quick overview:
https://ourworld.unu.edu/en/the-worlds-most-liveable-cities where Vienna is the only city in the top5 in all three rankings and Vancouver and Melbourne are the only cities to appear twice in the top5.