From a more factual point of view, this Dakar had a 55% finishing rate. I don't know about the toughest Dakar in years, this year's event had a better finishing rate than 2009, 2010, 2011, 2014 and 2015 (all years the race ran in South America).In the almost thirty years the Dakar ran in Africa, only five times did half or more of the competitors cross the finish line. It took until the 1990s to get over half of the starters to the finish for the first time.
Tacking on to the end of Red Bull's graph there, in 2015 there was a 51% finishing rate. 2016 was a 62% finishing rate and 2017 came in at an all time high 72%. Perhaps the issue is that the race has been catering to the results orientated professional rally teams more and more. With their money and vested interests trying to control the race and maximize participation and therefore advertising revenue, there is moneyed pressure to turn the Dakar into a glorified two week world rally stage. The quick professionals are the biggest complainers. If you're looking for proof, those inflationary finishing percentages tell a tale. Or perhaps it's because in 2018 everybody thinks they deserve a medal for showing up.
If anything this year's Dakar looked like the desert races of old with sand, dunes and savage navigation. What you're seeing here is Dakar sporting director Marc Coma's course design getting better and better. If anyone could take the Dakar back to its roots, it's the guy who was worried about navigation losing its importance in the first place. You can take all the press hyperbole fed by professional speed-racer whining with a grain of salt. The Dakar is in good hands and it will remain what it is: the toughest motorsport event in the world.