trying to remove bottom ball joint

Unload it, unbolt the spindle and move it out of the way. You should have a clear shot at it now. I have used 2 hammers, I smack both sides, at the same time, of where the ball joint goes thru the lower control arm to loosen it up. Then with the nut loose and so the bolt is flush with the top of the nut. Hit the top of the nut/bolt and it should drop out of the lower control arm