Hi,
Thanks for the nice clear picture.
With high frequency power supplies, layout is important, so try grouping your components closer with shorter wiring, it may help the situation.
Protoboard is not the best environment for this type of subject.
I can only see one resistor where the voltage feedback divider should be, R1 and R2.
Also no 10K, R3 in your layout.
It is very hard to see your MOSFET connections.
Can you post another pic from a different angle so we can see the DUE and the MOSFET connections?
Can you please post a drawing of your circuit for us please, if you reverse engineer what you have on your protoboard it my help check your circuit.
Double check the MOSFET pinouts as well as the Schottky.
Thanks.. Tom.. 