I have a complete avulsion of my hamstring 3.5 cm retraction the doctor said i was too old for the complicated surgery also not an athlete am i?

Yes: Sorry to hear of your injury. Repair of hamstring avulsion injuries w/ the displacement u describe is indicated in high - performance athletes where there is evidence of improved outcomes and return to previous sport. Non- operative treatment would be reccommended for someone in their 50's... The surgery itself can be demanding and not without complications(sciatic nerve very close)best of luck!