Complex sentence: The party suffered as bad a defeat as anyone could have expected in the 1971 election winning no seats in an election that saw Social Credit defeated after 36 years in power at the hands of Lougheed's Progressive Conservatives.
Split into simpler sentences: The party suffered as bad a defeat as anyone could have expected in the 1971 election. It was shut out of the legislature altogether in an election that saw Social Credit defeated after 36 years in power at the hands of Lougheed's Progressive Conservatives.