At the time, I was commenting on the clip posted in the OP. He looked disinterested to me. I've since listened to the entire interview. Envy and Charla kept asking her questions she had already answered, sometimes seconds before.
The language she used seems to be what people are responding to. She didn't describe people as "mediocre" or "average", but rather a toxic mindset a lot of Black Americans have. That's who she was speaking to. She wasn’t addressing Black men specifically.
I took it as Eboni describing a mindset. If you are extremely driven and work hard at what you do (whatever that is) then you're not mediocre but "exceptional". She was critiquing people who become complacent, doing the bare minimum to get by. People with little to no drive and ambition.
Part of it was the description of a mindset. But as she continued she actually used those words. She started talking about black ownership and entrepreneurship. So Envy used the example of his father not being an owner or any of that and that's when she started flip flopping with the reaching your full potential shyt.