I think the political situation/crisis in Belgium have little to do with the position of the monarch, and more with the somewhat unique situation of Belgium. It's a small deeply divided country; many of the top parties in the 2019 election participated only in the Dutch or French regions. While regional parties aren't unique to Belgium (e.g. SNP in Scotland), the way the votes are split between the two regions is a pretty big problem, and much of the disagreement stems from which list (Dutch or French) people in BHV could vote. This is an issue that goes back to the country's founding in various forms.