He only really addresses the fact that the system can be nasty. It can be and regularly is, but he only argues that a company doesn't have to be nasty, so he can conveniently ignore specific examples. But the system is not just nasty (and AOC mentions this). It also disproportionately rewards good fortune. That's not cheating, since anyone can have good fortune, but it is unfair, since fortune is not a consequence of hard work or ethical behaviour.
He also doesn’t engage with the fact that this company required funding from y combinator to get to that point
Which is something that is not an option for most people.
Look at where y combinator founders come from. It’s 99% people from elite institutions
That is a core part of AOC’s point
Getting a startup funded is just not something that is possible for most people. They just aren’t in the right circles. Does not matter how good of an idea you have
However, if you’re in the right circle, you’ll get shitloads of chances even after repeatedly failing. Just look at how many of these founders that “made it” drove multiple companies into the ground before making it. It’s a lot easier to find “good fortune” when you have a lot of chances than when you have 0 chances