Just to name a few of the major legal measures taken in the US to ensure equal opportunity, equal treatment, and equality before the law; not to mention an abundance of court rulings on matters of civil rights and discrimination:
Brown V Board of Education 1954
Civil Rights Act of 1957
Executive Order 10925 on Affirmative Action in 1961
Equal Pay Act of 1963
Civil Rights Act of 1964
Executive Order 11246 expanding Affirmative Action in 1965
Voting Rights Act of 1965
Creation of the Office on Fair Housing and Equal Opportunity in 1968
The Community Reinvestment Act of 1977
Mandatory school busing legislation
The Civil Rights Act of 1991
The First Step Act of 2018
If the problems of racial disparities continue to exist, excuse me if I doubt that these problems are “systemic” in a system that has outlawed every conceivable form of racial discrimination, whether in education, in housing, in employment, or in civic and political participation; and which has implemented proactive measures to accommodate for the disadvantages caused by previously existing systemic biases.