Can osgood sclatters be a permanent, genetic condition with chronic flares lastting in severity? can't find any information confirming this.

No: Once the growth plates at the tibial tubercle fuse then there is no more risk of asgood schlatter disease.

Ends at adulthood: Osgood-shlatter's disease is an apophysitis of the tibial tubercle. It is related to increased activity and is often seen after growth spurts (bones grow fast, and tendons do not keep up...Causing tightness in areas such as the patellar tendon...Causing excessive traction on the tibial tubercle resulting in apophysitis). At skeletal maturity, the apophysis closes and the pain goes away!