It's not that I don't like Dutch/Flemish, but it is hard to learn. I have enough to get by, and most people are kind enough to want to practice their English on me, which is great!
The Germans with whom I went to Dutch classes romped through it; not hard, given the similarities. The Brits and Americans struggled, not least with the syntax and pronunciation Ds who did Dutch at IGCSE tells me I sound German when I try to speak it, but I did German til 16, and I find it hard to be broad enough for a good Dutch accent.