Highly progressive (especially with regards to the Bill of Rights) for its time, but badly in need of massive revision or a replacement at this point.
What do you want to revise/replace?
Well for starters making the Senate far less grossly unrepresentative and/or reducing its powers, abolishing the Electoral College, possibly adopting a parliamentary system, and reducing the excessive powers given to states whose boundaries do not even remotely reflect actual realities.
You keep repeating this claim about the states but I don't think you understand the purpose of the states. They are not administrative districts. They are highly autonomous for a reason. The United States is not a giant federal republic spanning from coast to coast like France for an example. It’s a federation of states with their own distinct cultures and history.
Erhm France is an unitary republic, not a federal republic like the United States. That said while America's origins was certainly one of a federation of states, most later states were a creation of the federal government and with people regularly moving between states, identities have eroded especially with a large influx of immigrants who usually adopt an American identity but not a state one. Many identities that do exist don't reflect state boundaries either: for example someone who lives in Fairfield County or in Newark has far more to do with New York City (when one considers transportation policy or education) than a resident of Buffalo or Syracuse.
Parliamentary systems operate in federal republics such as Germany. If anything, the current American system by being more naturally biased towards two parties than even parliamentary systems with FPTP, does not reflect the heterogenity of the US. Also I highly doubt the result of the 2000 election was due to any special dislike of Al Gore by Floridian (I'm going with the assumption that Bush indeed won the state).
I never said I'm against an upper house that for example might only decide on a constitutional question or even an upper house that would elect its representatives in a fairer manner.
Don't worry, I don't consider this an insult.
very progressive for its time on civil rights
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He's correct if you use the actual definition of civil rights rather than the modern sense of "expanding civil rights for blacks".