Morris said it himself that the top execs didn't think he was the "right person" for the job and this was the main reason he left, as he knew no amount of work or brilliance was going to make them change their minds as they clearly saw him as lesser.
He wanted to be CEO and they said no. He went a different American company that said they would let him be CEO, but he realized he didn't want to be the CEO there.
OP didn't make any claims, merely asked the question. I don't think we can ever know how well this exact person would have done with a different racial background.
What specific claims of racism has he made?