What was your nightmare class?

I am just two classes away from graduating and thought it would be fun to hear which class everyone struggled with the most during their degree.

For context, I’m in the Supply Chain Management & Operations program.

D465 was without a doubt my nightmare class. Took me nearly a full month to pass it. Having to learn R Language just did not click with me whatsoever. A boatload of videos to watch and materials to read through. I probably spent 50+ hours on this class alone. Just beat me to a pulp.