Especially if you're in a rental.
Your first time on any track is always a very tricky thing. But when it comes to a track as long as the Nurburgring, even if you've spent a lot of time preparing, it's a lot of turns to memorize. That's how something like this can happen. We don't know if it was the driver's first time on the track, but the car is a rental (for track use, it's hard to find a Renault Megan RS at Hertz), so it's not impossible to imagine that the driver isn't very experienced. Which is probably why he went into the corner much too fast.
The driver surely knew he was going to crash long before he actually hit the wall, and it's pretty ugly when he does.