Specifically, American houses lack thermal mass due to being constructed mainly from wood. Concrete and brick will buffer over a week or so of heat before it warms up too much.
It’s not the heat completely - it is also the humidity. You can bear up to 80 F before it starts to feel uncomfortable. Humidity will make even 75F uncomfortable.
The Netherlands has a temperate maritime climate, influenced by the North Sea.
Florida and the Netherlands are not close in comparison.
My point was that people often don't realize how humid it is here. You apparently also can't believe it. And how our buildings are not made to keep heat out, but rather in. So I expect many more ACs to be sold here as well in the coming years.
It might just be a month or two each year. And it might be worse for you. But it's also getting pretty bad here already thanks to climate change. And that's not going to improve anytime soon thanks to all of us.