You cannot judge all blacks because of Marley K. The reason she is big is not so much because she necessarily represent black people, but because she appeals strongly to self-flagelating woke white liberals.
Marley K. is less of a problem than racism itself. Ignore her. It is more important to fight the actual racists. It is more important to read people who offer concrete policy advice, such as https://en.wikipedia.org/wiki/An_American_Dilemma