>>64126127 (OP)
Use dry fire to practice pulling the trigger smoothly, without jerking or twitching. Have a spent casing sitting on top of the gun, or a laser mounted or something, so you can clearly see any twitches. Practice until you can do it steady. Do this between all your live fire sessions, every day.
When live firing, pull the trigger real slow and smooth. Much slower than you think it needs to be pulled. Watch carefully for any jittering. If you twitch, back off a bit and pull again even slower. If your hand tires, set the gun down and rest and then try again. Try not to be aware of how close you are to the wall, etc., just focus on pulling smoothly.
You should be able to cut down on it a ton that way. If you're still struggling, buy some snap caps and randomly shuffle them in when you're loading a magazine, or have a buddy do it for you, so you have no idea whether the gun will actually go bang or not and can tell yourself it won't go off and to just focus on the smooth pull like during dry fire practice.
Then just practice more, slowly increasing how fast you pull as you manage to 10/10 not twitch at any given speed.
This works with much fewer rounds spent than just banging away hoping to get used to it through numbers. There's schools that claim they can train it out completely in less than a box of ammo this way.