well, the British-Dutch relationship has always been a bit problematic, hasn't it? Starting with Mary Stuart (dau of James I) who was imensely disliked in The Hague and whose mother-in-law (Princess Amalia) insisted on raising her son, the future Willem III. Later Charles II attacked his nephew William III, William III took the british throne and was one of the most impopular monarchs as he was to austere.
Later the unfortunate Charlotte of Wales broke her engagement to the future King Willem II and married the guy who stole a bride and a part of the kingdom from the dutch: Leopold of Saxe-Coburg. Then Victoria refused another dutch prince, the unfortunate Prince Alexander of The Netherlands (2nd son of Willem II and Queen Anna Pavlovna, who died from an illness after a tree fell on his carriage. Victoria also vetoed the marriages of Alice, Helena and Louise to the last Prince of Orange, Willem, som of King Willem III and the melancholic Queen Sophie.
During the Boerwar the Prince of Wales was boo-ad when he landed in Flushing to visit his dying sister in Germany and Wilhelmina (well, actually Emma) refused any english candidate for marriage, also because of the Boer war. Then after WW1 the german emperor took refuge in The Netherlands and Wilhelmina (who never had contact with him after this refuge) was treated very coldly by the british RF, when Wilhelmina went to Scotland for a holiday she did not even have a private encounter with George V and Mary, but an emberrasing meeting was arranged at a trainstation, George V and Mary were standing on a platform and Wilhelmina talked from a window form the train carriage.
The relations with George VI were much better btw, but then again, he was one of the friendliest kings that ever lived and so hospitable to the exciled dutch royals during WW2.
Queen Mary wrote very disaprovingly about Wilhelmina's decission to abdicate, so I would expect nothing less from her granddaughter. She simply cannot comprehand that some people see the monarchy differently then she does and obviously gets annoyed by it.