I think the most obvious album to point out which is about many things (including the abuse of the music industry) is To Pimp a Butterfly. I'm surprised I haven't seen it here yet. Even the title is very on-the-nose – the "pimp" in reference is both the music industry and (more frequently) the US government/social structures, and the "butterfly" is a fledgling Kendrick/black rappers/black Americans in general (context depending on the exact song). It's meant to be listened in exact order. Many people say it's overrated but I really disagree. It's an amazing narrative and powerful symbolism with good music.