Nobody is "blaming" individual consumers. They're just respecting their free agency. Most people who purchase from Amazon prefer it to brick and mortar stores and other e-commerce websites. Most people who work at Amazon fulfillment centers willingly accept higher expectations in exchange for better pay. You don't get to decide whether someone is being coerced or manipulated.
We don't have strong enough democratic social and labor movements that can move the needle yet. If we abandon the individualistic frame, we begin to see the necessity of joining political groups and regularly discussing our problems and how we can try to solve them, sometimes by coordinating with coalitions of groups to increase power.