'Pissed' At Backlash Over Investigation

Bubba Wallace is clearly upset by the backlash over the results of the FBI investigation into the alleged noose in his garage at Talladega ... saying, "I'm mad because people are trying to test my character."

The FBI and NASCAR both say the rope found in Bubba's garage in Alabama on Sunday was a rope pull that was fashioned into noose ... and it had been in the garage stall since 2019.

Investigators concluded it was NOT made as a threat to Wallace -- and the case will no longer be pursued as a hate crime.

Wallace appeared on CNN just hours after the announcement was made on Tuesday -- and seemed to dispute the findings of the investigation.

"The image that I have and I have seen of what was…