I'm a man, I'mma make a new plan
Time for me to just stand up, and travel new land
Time to really just take matters into my own hands

from Eminem – 8 Mile Lyrics on Rap Genius

He was fed up with the troubles he was going through and because he felt like nothing was going right and nothing was quite the way he wanted it to be, he finally decided to take responsibility for himself and make things happen

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