I also live in Vienna. Of course, it doesn't make sense to declare a city as "the most livable" as people value different things. Personally, I find the quality of living to be very high. The things I value most: great public transport, lots of parks, pools and playgrounds, very cheap child care, lots of music/theatres/museums, low crime, large (affordable) appartements. The big bonus: swimming in the Danube in the summer :)

That being said, you are certainly right that Vienna (and Austria in general) is not very attractive for entrepreneurs.