There's a rough honesty to this book that I think some folks just don't have the stomach for, and that's where a lot of the criticism seems to pool. I've seen quite a few readers over the years get genuinely uncomfortable with the unflinching depictions of childhood trauma. They'll call it graphic or excessively bleak, as if Angelou was supposed to soften the edges of her own life for their comfort. It misses the point entirely, which is to show how that brutality shaped her.
Another angle I've noticed is a frustration with the structure. It's not a tight, plot-driven narrative, and some people bounce right off that. They expect a more conventional arc, but the memoir moves in these almost episodic waves of memory and reflection. If you're looking for a fast-paced story, you'll probably put it down. For me, that meandering, reflective quality is exactly what gives it its power—it feels like listening to someone piece their history together, not watching a dramatization.
I also recall some older criticisms, less common now, that took issue with the portrayal of Black Southern life as 'negative.' That always struck me as a profound misreading, confusing the documentation of hardship with an indictment of the community. The book is steeped in love for that community even as it details its fractures.