Mental Golf or Psychology Golf
Doesn't matter what your preferred term is, either way it's the mental game within our game.
The mental game is an important aspect of the sport.
We all know that confidence and commitment can play positive roles in our outcomes on the golf course, or have negative impacts when they are lacking.
Getting mad at yourself over a lack of performance is non-productive and can erode your confidence.
The instant you hear yourself starting up the negative stuff, say to yourself, "stop," and don't allow yourself to finish the negative thought. Now change that negative into something productive.