Can't say I agree with your first paragraph, but these parts of your second are 100% true and much more important than our whole preceding argument:

The reality is simply that the US constitution is an outdated document that should not serve as the basis for laws in a modern country

the system it created sucks. It completely failed at granting meaningful rights to it's citizens and prevent fascism

founding fathers had no idea what the country will look like 200 years later and didn't prepare the laws for it.