Complex sentence: In the end, he failed to rally even his own former colleagues in the National Front behind him and his government was overwhelmingly rejected by the masses, except for a very small number of pro-Shah loyalists and a handful of moderate pro-democratic elements.
Split into simpler sentences: In the end, he failed to rally even his own former colleagues of the National Front. His government was overwhelmingly rejected by the masses, except for a very small number of pro-Shah loyalists and a handful of moderate pro-democratic elements.