Hunger Games star Donald Sutherland went to his death deeply distraught that he hadn’t done more to help his actor son Kiefer when he was desperately battling the dual demons of drugs and alcohol, insiders claimed. Sutherland passed away following a long illness at 88-years-old on June 20, as RadarOnline.com reported. “Donald died regretted the fact that, for many years, his physical life with Kiefer was nonexistent,” a source told us. “He loved his son but mostly from afar and he’d wished he’d helped him when he really need it the most.” The gaunt, thrice-married 6-foot-4 Dirty Dozen star onc…