well i just came back from the test flight. The plane flew better and on approach was a lot more stable. I did a wide approach, came in shallow and faster than usual, throughout the descend the plane was rock solid, with a uniform descent rate, looked like it was going to be a picture perfect landing. The moment the gear touched the ground the plane took a front flip and broke the motor off the motor mount.

I will try to reduce the spoilers little by little after repairs as aerowoof suggests.
I am starting to believe that the terrain i land on is the biggest problem and not the plane. My usual landing spot is a grass field (its a bit patchy and tall) and every time i "land" on it something breaks. there is a small dirt field beside it that is a lot better for landing, but there is no room to fly there.