When you make your practice swings, they feel great; you have a lot of clubhead speed going towards the target, but when you get to the golf ball, your slam the ball into the ground. Why does this happen? The golf ball distracts us.
To combat this, work on moving the ball well forward — on your front foot with a mid-iron. This will force you to bridge the gap through the bottom of the swing by turn through impact with your lower body so the clubhead keeps moving towards the target as it gets to the bottom of the swing.
This applies that feeling of awareness of how the body should move through impact, which will allow you to swing freely through the ball when it’s in the proper position.