This seemed like a fatal flaw with the Wermacht - the fascination with big, bad weaponry. The Maus and Gustav to name two more. Both epic failures.
And don’t forget Big Bertha! Enormous in size, and cost in money and resources, but pretty useless.
Kind of like the snark I’m always making about the Empire in Star Wars. They keep building these enormous weapons that have to be galactically expensive, which then get destroyed by the equivalent of two guys with two screwdrivers and a wheelbarrow. They they do it again! Apparently the Empire suffers from the same shortcomings as the Reich, nobody’s analyzing bang-for-buck (and making sure high-value weapons aren’t vulnerable to cheap, low-tech attacks).
I once came across an article that broke down the manpower and material used for the railway guns, and translated that into useful armor units.