In my first corporate job out of college (a NOC at an ISP) I was asked to update the documentation for troubleshooting quality of service issues. I checked our wiki for what was already there and it horrendous. I started to mentally thrash the person and was going to go confront them about it. When I checked the edit history I was greeted by a single edit and my username a week after I started the job.

I learned a great deal of humility and compassion in that moment.