Loved this short and sweet piece of yours, flow is on point and the running rhymeschemes transitioning over isn't perfect per se but they do what they're supposed to in great fashion. The story paints a vivid picture with great vocabulary to strengthen the points in your verse without it seeming forced. I also enjoyed the metaphors you were using, Rubix Cube line kind of stood out to me but that might be because I connected it to a comic I enjoy quite a bit and felt it fit the topic although the message is different. Either way I think it might reflect the situation your protagonist is facing despite the fact he gave up too soon imo:
Good shit Mr. J.
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I'm not a slave for entertainment, I'm entertainments personal slave,
So deep into writing I'm concerned bout the text on my grave.
www.youtube.com/watch?v=gV8ozGcGJ6o