Was checking out some of the keywords www.wdg.com.au comes up in Google, and came across this that was linked as well from the query for "web design":
Biggest Mistakes in Web Design 1995-2015
Having been in web development in some form for the last 13 or 14 years, I can relate to almost all of them :) One of my favorite videos is the "9. Forgetting the purpose of text" one here:
http://www.youtube.com/watch?v=C9JOvlEsfzE