Wasn't this picture already debunked ages ago?
The real border starts like 100m further and has a clearly defined line. And the quality of the roads is pretty decent on both sides.
I know the joke about Belgian roads being bad, it mainly has to do with Belgium being used to travel through by the surrounding countries, because we don't tax people for usage. So it all gets completely funded by the citizens actually living there.
The Netherlands roads are really quite good, but I am more in awe about their beautifully designed traffic light system. You never have to wait long, and usually don't even have to stop because it all flows so well.