Dislikes: Bret Hart
Bret Hart was the victim of the infamous Montreal Screwjob that benefitted Shawn Michaels. This was probably the most controversial moment in the history of WWE.
After Survivor Series 1997, Bret Hart's contract with the WWE was going to expire. The same night, he was going to defend his championship against The Heartbreaking Kid, Shawn Michaels.
The show was in Hart's home-country (Canada), and he didn't want to lose there. Hart pitched the idea that he would retain his title and then relinquish it later to join the WCW. But, Vince McMahon didn't agree to it.
Finally, The Boss agreed to him, but he actually had a different plan in his mind. At the Survivor Series, Michaels won the match in a controversial way. This generated a lot of heat from the Canadian audience towards Michaels and Vince McMahon.
One of the reports suggested that The Game was the man who suggested this idea to Michaels and McMahon. He didn't like the way Hart denied to lose his title and probably this is why he dislikes him. Both superstars have exchanged words in the past and it seems like they are still on bad terms.