Hay nets are a piece of cake if you know this trick:
Get a round upright trash can (the one that are about hip high and about the diameter of a circle you make with your arms held in front of you.
Drop most of bag into trash can, draping several inches of net over the outside edge to hold it open and in place.
Place 3 - 4 flakes of hay in net. It will naturally drop into can and you can cinch up the cord that closes the top.
Hang from hook placed high in the stall. I use some of those over the stall blanket hooks. Easy, movable and versatile. No metal parts for horse to tangle with. I did have a feeder like the one in the post above. It worked OK, but didn’t hold up well and was a bit of a pain.
I have one horse that likes to play with his bag once his hay is gone. He has dislodged it a couple of time. I just wrap the cord around the hook a second time. Problem solved.
One caveat, my horses are barefoot. I don’t think I would use hay nets with shod horses. YMMV.
I have not had any barn help, DH included, that did not like the “trash can method.”