My worst legacy code experience was when I worked as a freelancer and got a tiny job to improve a VBA module in some Excel file for a very big company. So what's worse than VBA? Having to change parts of VBA code that was passed around to other freelancers before like the cheapest dockside whore. After meddling in there for about half an hour I felt like all those cheap ass punter, so I decided to write the whole thing from scratch. What a relief, after 3 hours I was very proud of the thing and it looked clean and well maintained again so I let it back on the streets. 😉
To the coder who comes after me: Please treat her (the code) nice or I will burry you alive in dog poop and burn the whole thing!