Comparison with UK is going for an easy win. Dutch should compare their trains with German or Japanese trains. Then, they suck!
If you use them occasionally you think they are amazing and much better than most other networks but if you rely on them everyday then you quickly realize how bad they are. Lots of random delays and unpredictable behaviors. Smallest change in weather causes disruption. And they are actually expensive even in comparison. (I cannot find the EU report that showed that, I’ll update the comment with it)