Seeing red

As I approach 50 I am beginning to wonder if I'm getting a "grumpy old man".  Yesterday I experienced "supermarket car park" rage when someone waited for me to return to my car and then "thanked me" for the room I'd left him.  As my car was in between the white lines I didn't feel there was an issue but we "had words".
Today I was red carded by the referee at my sons football match for suggesting he "should have gone to specsavers" - or words to that affect.  What does upset me is when our kids safety on the field is at risk because the ref can't keep up with the game because he's had too many pies!
I then went out for a relaxing 35 mile bike ride with my mates to celebrate my up coming birthday.  At least that was incident free and finished with coffee and cake.  But I am going to take stock and calm down on the sidelines and let my sons feet do the talking - assuming someone hasn't taken them away from him recklessly!