That's pretty normal for a part stamped or sheared from a larger piece of plate. What you're seeing is where the surface of the material tore a bit during the shear operation; certain steels tend to do that more, or if the shear dies are a little worn. It looks like most of it was ground flat but some of that rough tear line remained. Nothing to worry about, but I suppose it probably doesn't feel like the quality you were hoping for.