Leadership?

why does it always make me angry when something goes wrong and ....... 1. someone who should have automatically taken leadership on an issue just simply failed to do it and just waited for someone else to take the lead, and/or 2. people point a finger at their colleague(s) rather than think, "what cd I have done differently?", "did I contribute to this in anyway?" etc...... have to check with my boss(es) how many times I have done this myself!! :-)