I've been doing some more playing with data. I thought I'd ask myself, who has been the worst team over a longer period of time. So I put together the rolling seven year average of season P% and showed who had the worst rolling average in each year. The grey marker is the best performing team in that year.
It's not perfect I haven't factored in some things like making sure a team has been around for seven years so the 95 Sens show the worst-ever result over the entire 100 years of data, but that's partly due to it only being an average of three years. I'll probably tweak that later. I'm interested to see who has the true worst-ever 7 year average. It also means that 2005 - 2012 is a transition period going from pre-shootout era to the current shootout era so you see the worst P% average increasing each year throughout that time.
It's interesting to see that although we've been bad, we are not as bad as the 2015 Edmonton Oilers were.