Many drivers are satisfied with their own ability at roundabouts, but consider most other drivers do it all wrong!
What are the advantages of roundabouts?
When used correctly they assist traffic flow at busy road junctions by allowing drivers to enter and leave by different roads with the minimum of inconvenience or danger.
They are really one-way traffic systems in which several streams of vehicles can mix and circulate in a clockwise direction only.

Before finding fault with other drivers' behaviour at roundabouts, check your own knowledge of the rules.

GIVE WAY is the most important rule — when entering a roundabout give way to any traffic already on the roundabout on your immediate right, unless road markings or road signs indicate otherwise.
Keep moving if the way is clear.
Some drivers stop when entering a roundabout which is obviously clear of other traffic.
This simply slows the flow of traffic and causes unnecessary and frustrating delays.
Give Way signs are not placed at all roundabouts, but the point of entry is marked by a single broken white line across the road to indicate the give way rule.
At some locations road markings or road signs indicate free flow on to the roundabout in specified lanes.

The correct speed, position and signal on the approach to the roundabout, while on the roundabout and when leaving the roundabout are all vitally important driving skills to be considered and applied as necessary.