You assert that during a slump workers and capital are (painfully) transferred out of an overblown investment-goods sector back into production of consumption goods. But this immediately raises the question, why isn’t there similar unemployment during the boom, as capital and workers are transferred into investment goods production?
“but during the phase of rising investment, the economy is booming!” you shout, which is of course circular. Thus you weirdo Austrian types seem to be Keynesians during booms without knowing it; u realize that high demand produces a boom, but don’t realize that this contradicts ur own theory of slumps.