The problem with anger is that it is intoxicating. The more we indulge it, the more we are likely to indulge it in future.
Anger can be constructive, but mostly it is not. Even when it is constructive, often there are better ways of going about something than relying on anger as motivation, both for ourselves and for others.
IME most anger comes from within. It is our critical inner voice turned outwards.
We can learn to control our anger. The first step is learning to recognise it when it occurs. Once we can do that, we can then learn to take a step away from it. The more that we do that the easier it becomes.