Change to things that actually matter is supposed to be slow and difficult in Government. Otherwise there would be constant change as either side managed to seize power, and our legal system would be completely unpredictable.
Looks like Kwanzaa was bigger until 2018 when Juneteenth first started getting promoted.
That said, I'm from the upper midwest. Views on Juneteenth are probably different, particularly in certain other parts of the country.
This is mostly only true of presidential systems, and a particular affliction of ours. Parliamentary systems are not like this, nor is there constant instability from too much change.
One representative for every 50k citizens. Clearly the building isnt big enough to hold all those representatives. Force them to work remote and live near their people.
If the American system were actually intended to operate as you describe, that intent would have been put into the Constitution.