Like others have said, try stretching the headband. It does help.Your description of the Hemp with the L-pads actually doesn’t sound so bad — that sounds a little more like the Grado sound to which my ears are already accustomed to hearing. In any case, I’m definitely gonna try the L-pads because these stock F-pads are painful after about an hour.
I get these brand new a few days ago and I love the looks and dig the sound but it is different so I wouldn’t sticking with the stock sound if my poor ears weren’t in pain from the physical discomfort.
Yesterday, I had to take them off and give my ears a break — the K712 Pro were the solution.
Also, just try to tough it out for now. The pads will break in with use (as will your ears, lol) and you will learn to fit them better with some trial and error.
I find wearing them lower and father forward (such that the pad doesn't pas the back of my ear or the bottom of my earlobe) works best for me.