It can be.

If we're just sounding off or taking the opportunity to leave other people devastated, it's not. It can destroy our relationships and leave us feeling worse.

But there is a place for anger with a purpose.

Anger is the electric charge. The outcome is the professional you, expressing your dissatisfaction, focusing on the behaviour, asking for action simply and clearly.

'That phone is very distracting, please turn to silent now.'  

'I've noticed that you have been late to our meetings several times. Please make sure you are on time from now on.'

Expressing anger with a purpose is good for your health. An alternative is rumination - going over and over the causes of your anger. Nothing prolongs stress like rumination.