How did the US go from having luxurious, widely used passenger trains to the Amtrak system we have today?

Will the United States ever catch up to the rest of the world when it comes to train travel, or are Americans stuck with an underfunded, inefficient rail network forever?

More was spent in 2022 on US highways than in the combined 52 year history of Amtrak:

Federal Highways: 64.3 billion Amtrak budget: 2.3 billion

Updated high speed rail is an essential element of cutting our carbon emmisions as is cutting air travel.

What I learned from taking a train across the US - YouTube