Comment by Ididntdothis

I am usually pretty patient with people and generally don’t get offended. In this particular case we had worked very hard on that problem for a long time. This project was highly visible so everybody knew what’s going on.

I think people (I tend to do that too) should think twice before giving unsolicited advice and make sure they have thought about the problem for a while and have something of value to offer. Otherwise it signals a lack of respect.