Looks like every edge in your low poly is set to hard? To get a good bake, you will need to soften edges, except at hard (90 degrees or more) transitions in the model. For each hard edge, you will need to create a seam and leave a few pixels of padding between the UV shells. Also, this thread is helpful.
In Maya any hard edge must also be a seam in UV space... All other edges must be soft. And not all seams need to be hard, only those that are 90 or more (just like the post said above). Also, when your baking, use the envelope and set it to something like .5-1.5 It doesn't look like your getting any projection burning in…
Yup soften your normals And if they look weird when you have softened them try unlock notrmals If they still look weird try splitting the mesh up and softening everything then merging back together Great advice throttle and Kon! I didn't know about the 90 degree or UV hard edges on Uvs thing ^^