I am milling PCB with 0.1 mm 30 degree V bit at 24k rpm. I think that is better than end mills. Anyway, PCB is considerably harder than wood so you need high rpm, good cutter and just right feed rate. Of course, you also need a machine with low vibration and good rigidity. But if you don't have that, then you can try to lower the feedrate. It is a bit of a trial and error, but best is to start slow with the highest rpm you can get, not too shallow cuts, try 0.4 mm since most copper layers are 0.35 mm so that should be good enough. Also, use some sort of waste board between the PCB and the table. I use MDF which is levelled.

Your picture shows that you have other problems too. Did your machine run away uncontrolled?