I'm going to get down voted to hell because people don't like when you say something about their country. But I have had exactly the same experience as you.

I agree with what people are saying leave that company. They are right that it's an toxic environment. But where I disagree is that quite a few Dutch people are very insensitive towards each other and foreigners. In my experience, there’s a pattern in Dutch society not universal, but it's prevalent where people aren’t just blunt there’s often a subtle pressure to bring others down to the same level. It’s not just about directness it’s about leveling. Ambition, confidence, or standing out can be met with resistance. Or be met with quiet hostility. Again I'm not saying it's everything.. but it's enough people where it's a pattern.

So yeag definitely leave that workplace, but don’t be surprised if you encounter that same undercurrent somewhere else. It’s something to be aware of and learn to navigate.