Through the barbed wire
He’s celebrating that he made it out of Compton and into the good life, no longer having to deal with the obstacles that went with living there.
Barbed wire is a common poetic symbol to represent overcoming these obstacles.
For example from James Wright’s A Blessing
We step over the barbed wire into the pasture
To help improve the meaning of these lyrics, visit "Barbed Wire" by Kendrick Lamar Lyrics and leave a comment on the lyrics box