Got this today, after long 8 hours of triangle spam.
The hint that helped me the most was to always try to have a moving pattern of waves.
At first, it will be hard to get the wave movement, but after a few tries, you'll get the swing of it.
With time you'll be performing better and better, and by this, I am not saying that you'll be doing all runs equal, some better some worse, it depends on the momentum that you get with the waves.
Eventually, you'll get it, I remember that before having the 10 points, my previous attempt was 5. Just keep trying and don't break the controller.
Good luck, hope this helps.