Da Prophet
Mid-Card Championship Winner
Goldberg literally never beat Bret Hart. Bret even won the concussion match. Goldberg, in the record books, is Bret's bitch. Also, the Goldberg concussion didn't end his career, it was one he got afterwards.
"Bill Goldberg kicked me in the head and ended my career because he didn't know what he was doing." Bret continued, "You get guys that cost me millions and millions of dollars, cost me my career, probably led to my stroke, and so many things that happened all because somebody didn't know what they were doing." - Bret Hart interview by Forbes 2016.
So, you're wrong. Bret Hart acknowledges that Goldberg's kick ended his career. Ask Bret Hart who won out of him and Goldberg. One just competed in a main event of WrestleMania while the other sits at home unable to do basic tasks, watching himself on the Simpsons, and complains about the state of professional wrestling.
Bret couldn't handle the physical nature of being in the ring with Goldberg. He sure as hell isn't surviving against Brock Lesnar.