Focus on the road
Don't waste time arguing, focus on the road, if you made a mistake accept,learn from it and move on.
Do 1 thing at a time. you have 1 tonne of metal in your hands.
Lives can be at risk, others gather information from you that is why we have indicators and brake or reversing lights USE THEM.
Be mindful: Driver etiquette, do what you want others to do to you.
If everyone broke the rules what chaos would we have on our roads?
As part of being a driver its your responsibility to abide by the rules, to keep everyone safe,
Remember Gen X,Y and Z, you will teach the older generations about indication on roundabouts, as not many know how to use these rules.
YES even if going straight, the rules state
before exiting roundabout you must indicate left.