If you are trying to raise the hook for the second or third time, you need first of all to to lay the scraper flat on the bench, and run the burnisher along the edge, prior to raising the hook.

You won't get a satisfactory hook second or third time round just by burnishing in the same way as you would do with a freshly stoned edge.

...Anyone knows a good shop that sells patience?

I never have gotten good at turning a hook on a scraper. Gotten it great a few times, but now I just use the method from Ervin Somogyi's book, where you polish up the faces near the edge, and then clamp it in a vise and run a file along the edge a few times to make a sharp 90 degree edge on each side. No hook, just use the 90 degree edge directly. Way easier, shaves plenty fast, and only takes a few seconds to resharpen so you can do it every couple minutes for an always-fresh edge

All this effort may not be necessary for other than finsih work. Richard Brune once showed me that he lays the scraper down on the support in front of a grinding wheel and runs it back and forth quickly at 90 degrees to the wheel. It is then ready to use with the burr remaining from the grinder. He scraped large amounts of wood immediately.