Is anger a proper reaction?

I don't know why but this week my mood is pretty bad. Although I do get angry from time to time, I rarely explode in front of everybody. Well, not that rarely but I may say relatively rare. Anyway, a couple of days ago I cracked. I threw a fit of anger and do lots of yelling.

What particular about this anger is that I don't really know whether the situation deserve such an extreme reaction or not. In addition, by being angry I lost a key advantage in doing business with them..

The event is really simple. That particular day, the quality of materials delivered to me is really pathetic. It's so pathetic that I, the one who usually tolerates many defects by allocating the materials usage so that defects become irrelevant, end up rejecting up to 90% of what they sent.

All supposed to be well. Bad goods, relative to their price, get rejected. It's fair. But the supplier had the guts to talk to his friend, saying that I should not order those items if I don't know how to identify good materials, in a deragatory tone. He said all of that it in a language that, given the situation, it's safe to assume that I don't understand.

But I do understand the language. And boy oh boy, I yelled at them, in front of everybody. I challenged them to show people the materials they had sent before. And let everybody be the judge of how bad their goods were.

Luckily, they had the decency to not take the challenge and just shut up. Unluckily to me, now that they know I can speak their language, I don't have the chance to eavesdrop while doing business with them..

Anyway, this event made me think. I'm not supposed to be that angry to them considering that they do not intend their conversation to be heard by me...

Oh well..