Great to hear you are seeing results with smashing the high adductor/groin.
Have you smashed or had someone smash your hamstrings?

Are you addressing the medial hamstring/ adductor connections?
Skin could be tacked down in these areas. Re-establishing sliding surfaces within these areas will change your experience. You can use a voodoo floss band or I.A.S.T.M. w/HawkGrips to re establish the sliding surfaces.

Following an injury in impacted side may not perform at top levels right away.
Was there a difference in the max strength, leg extension, or leg flexion strength prior to the injury?
Re establishing sliding surfaces allows the skin to move independently from the muscles and tissues.