So in golf you normally have a fault and there is an error that breaks the chain down the line. A lot of the time people don’t make long term fixes since they are trying to change the effect not the cause. For example if I’m hitting it fat, it might be from a steep downswing and then trying to shallow the club late.
Now that’s out of the way if all else is good and you still hit it fat. I would be working on shaft lean and weight shift at impact. My favorite drill is a short swing drill or hitting down hill lies.