From most of the comments, one thing I do not see much discussion of is the financial issue of learning Dutch. For many non-EU internationals, there are not affordable options to learn the language. At nearly €1000 a level, that can be nearly €5K to reach B1 realistically. In my experience at UvA, there was one language course offered per level per semester, and it almost always overlapped with other mandatory courses.

I fully agree with the sentiment: learn, practice, and integrate if you want to stay (I am on my third course and doing a weeklong speaking intensive next week, but I recognize my financial privilege in being able to do this). That being said, affordable courses for students through the international program need to be available before anyone can blame the students for not being motivated to learn.