How is sharecropping a reason why Reconstruction was a failure?

One of the
purposes of(at least in the minds of some people) was to give the freed slaves a chance at a new
and better life.  The fact that sharecropping became so prevalent shows that Reconstruction
failed to achieve that goal.  Sharecropping kept blacks in poverty and in a position in which
they pretty much had to do what they were told by the owner of the land they were working.  This
was not very good for the freed slaves in that it did not give them a chance to truly escape the
way things had been during slavery.