This depressing account just made me wish the author could enjoy Amsterdam instead of work in that miserable coffee shop. Try a museum, visit a castle, take a boat ride, have some world class omelette. Like most other places, visiting Amsterdam is what you make it to be.
I sometimes work in Amsterdam. It's near my house. I hate tourists in Amsterdam. They clearly come to my capital for the wrong things. Plus they only visit the capitol; there are so many nice cities in the Netherlands to visit, some are even more beautiful than Amsterdam. To cater to the tourists the city also changed for the worst.
I wonder whether that might explain a number of incidents where I've been treated very very rudely when I've visited Amsterdam or Rotterdam, even when I'm not "one of those toursists".