Don't give up. There is a certain amount of finesse involved and it will come to you eventually.
It is probably one or two little things you may not be doing exactly right.
Little things that make it harder include-
-not cleanly burrowing into or exiting the amsteel. In other words, poking in and out of the amsteel within a fiber bundle and not between the bundles. This makes it harder to pull the amsteel into the beginning of the bury and causes it to bunch up.
-pulling or pushing too hard. There is a magical balance between just the right amount of compression of the amsteel bury area and too much.
-bunched tapers. If you taper the amsteel before you attach it to your threading device (wire or loop turner) it pulls in easier. If you do like I did at first- cut it sloppily or leave lumps- it will bunch up at the point it enters the amsteel and form something like a knot.
I wound up watching a lot of Youtube videos and trying to see what they were doing that I was not. Eventually it fell into place.
Keep trying and good luck.
"Live your life so that your children can tell their children that you not only stood for something wonderful- you acted on it"