The grammar rules make no sense and sometimes have more exceptions than cases it applies to.

said the native speakers of like half the languages on this planet

dutch grammar is about as regular as most west germanic languages (germanic grammar tends to be relatively irregular compared to the norm though) but something that makes it “easier” than a language like German is the total lack of cases (in the modern standard) and only 2 grammatical genders.

althoughhh dutch, and english, do have extremely opaque orthographies in terms of reading, trying to figure out the pronunciation of a word based on the spelling is pretty much useless most of the time, which isn’t super common among writing systems