The argument is that critics of AA are committing the Fallacy of Composition. Specifically when saying that since giving out scholarships doesn't result in equal educational outcomes, then we should stop giving out scholarships.

I am with the author on this one. Creating better educational outcomes (for all students) is a coordination problem.

Critics are typically saying that giving out scholarships limited by race is racially discriminatory.

This doesn't address the question and adds to it a misrepresentation of the facts.

Which facts are misrepresented?

The point is that the author picks some arbitrary critique and calls them fallacious, when the core of the disagreement is elsewhere.