I dine out in Amsterdam quite often and have yet to encounter a rude waiter. What did happen is that one day we had a party in the upstairs part of a restaurant in the inner city and due to a shift change they totally forgot about us. We had a great time but went home hungry, nobody went to alert the staff to the party because we figured it would be more fun to see if they ever turned up :)

Rudeness only if you “cross the lines” with them, like demanding service. But terrible, slow, unatentive, untrained waiters is definitely the rule here.