My guess is that he didn't react fast enough on the power of the car, crappy car also, it was a €750 car, but he thought, hey let me test teh power of this GTi.
And this on a quite small asphalt. One wheel got besides the asphalt. Need I say more.
From the pictures it looks like he hit the tree on the right hand side of the road, with the left hand side of the car. Couldn't be worse.
Or he came from the other direction, hard to tell.
However, the car was sold to a garage, AFAIK that means the seller can't be sued for shhit.