It is possible to exaggerate systemic racism just like it's possible to exaggerate anything ("cobra bites are always deadly"). But you cannot conclude after witnessing an exaggerated account that the phenomenon isn't there ("cobra bites are harmless").

Here's a pretty good curated list of carefully documented instances of systemic racism: https://erik-engheim.medium.com/proof-of-systemic-racism-in-america-b8b93c0091d2. Lots of basis in fact there to chew on.

The list is by no means complete, but it should completely dispel the idea that systemic racism is a myth. It's not.