Things that are so obvious and ingrained that no one even thinks about them.
Here’s a few:
All US americans can go to Mexico EASILY. You’re supposed to have a passport but you don’t even need one (for car/foot crossing). Versus, it’s really hard for Mexicans, who aren’t wealthy, to secure a VISA to enter the US. I’m sure there are corollaries in other geo-regions.
Another one is wealthy countries having access to vaccines far ahead of “poor” countries.
In US, we might pay lip service to equal child-hood education but most of the funding pulls from local taxes so some kids might receive ~$10000 in spending while another receives $2000. I’m not looking it up at the moment, but I’m SURE there are strong racial stratas.
I always get a kick out of how silly they were and how bad at designing governments they ended up being. Like you pointed out their first attempt was a shitshow, and when you read the federalist papers he outright says the entire plan is for there to be no political parties, if we get those it won’t work and we’ll all be fucked.
And yet as soon as King George relinquished the presidency we had a two party system, in fact the Constitution more or less makes a two party system inevitable. And it has no provisions for the legislature being unable to legislate etc, basic stuff that the British had already had to solve with their Parliament.
And yet they’re supposed to be these incredible architects of a genius system of intricate checks and balances.