Right, I totally understand that. It is surprisingly difficult to find 2 hours a week, consistently every week, to sit down and work on one of these courses.
I am just saying that the game theory course is by far the most accommodating of all the Coursera courses thus far. Even the exam, it was 10 questions that honestly only covered the easier parts of the material (e.g., dominated strategies and mixed equilibrium, but nothing to do with the core or shapley values), and they gave you like 10 days to complete it.
I think the main takeaway here is that even though this class was really optimized for completion, you still found yourself too busy. This is probably because the course is on the same schedule as your university classes. If they shifted the calendar a few weeks, so that it was mostly during the summer and winter breaks, they would probably see a lot more completions.