How to become Dutch

You can become Dutch by living in the Netherlands for long enough. It's also possible to become Dutch when not living in the Netherlands, if you're married to a Dutch citizen and living in a 3rd country (so not in a country where you have citizenship).

If you were Dutch before but lost your citizenship there's an option procedure of 1 year. It requires living in the Netherlands for one year, which can be hard if you can't easily get a resident visa.