Every one of your complaints stem from Americans not marching in the past.

This is largely my point, but the more accurate description is that Americans were convinced that those things are bad and should be protested against rather than protested for.

You can't come in here and disparage more than 3 million people (now corrected in the final tally to 13 million people) in an organized protest across a country the size of Europe with that background of stomping down people's ability to protest because a country the size of a single one of our states organized 150,000 people to protest in one city in a country without all those barriers. It would be like me coming in here and saying that the UK doesn't care about the genocide because they had 0 people protesting in London during this protest, or complaining that Russians and the Chinese aren't protesting hard enough.

Historically, most major protest movements in the US since WW2 have come from college students, as they have the financial security to spend the time and energy of being activists while also being the youngest group usually to be politically active, but this is yet another area where the US has cracked down on protesting. Since the Vietnam War protests, the cost of college has risen something like 1,000x (not percent - one thousand times the cost) as a direct retaliation to the protests. Colleges across the US have been protesting the genocide in Palestine since it began and have seen massive police crackdowns including arrests, students being kicked out of college, police stealing or destroying students' property, and students in custody being denied access to life-saving medication.

The last time major change resulted from social upheaval in the US was when MLK was murdered and billions of dollars was burned to the ground in riots that shut down entire cities for a week, and the government has spent the 50+ years since convincing the population how that change was the result of very peaceful and polite protests that didn't inconvenience anyone. The Million Man March was a threat and a display of force that left white people all over the country shaking in fear in their suburbs, and today people think it was a jolly jaunt through the city like a Pride parade.

Let's make a comparison: the city of Boston, Massachusetts had an estimated 2 million protesters on Saturday. Massachusetts is just about half the size of the Netherlands, with a population of about 6.5 million people (compared to the roughly 18 million who live in the Netherlands). That's a protest roughly 1/3rd the size of the entire population of the state. Obviously, people were coming from all over the place (other states included, Boston is one of the major cities in the region), but that doesn't count all the protests that happened in small towns across the state and region as well. We know for a fact that these protests were larger than just about any other time in US history.