Being the most highly awarded game of all time is normal....almost every year. The latest hit more often than not sets all sorts of records. It happens in music, movies, games, you name it. We're in an expanding market, with more and more people getting involved all the time. The kind of record sales that made the Beatles legendary would be considered mediocre today, movies regularly outgross the mega-hits of the previous few years, and a game made 5 years ago that sold fantastically well would be overshadowed by a lot of games that merely sold "well" today. If Witcher 3 didn't outsell a 5 year old game, I'd consider it either a niche title or a poor selling game.
About the only thing all those awards tell me is that it either did better than FO4 (somewhere between a complete sandbox and a "fixed protagonist" game, which makes the comparison less meaningful), or paid a lot more for advertising to the companies the award givers work with. Anything made before the last couple of years needs to be "adjusted" for the size of the market at the time, in order to make a valid comparison.
I suppose that "Awards" are like "Achievements": they're something that people try for, but are ultimately meaningless. "Congratulations, you're only the 3,487th player to do this rare and difficult feat....this week".