Complex sentence: Nicholas' heavy-handed actions in the "coup" crisis irreparibly damaged his image (already battered from previous policies he had pursued); this in turn caused many of his subjects to eagerly embrace the next revolution, when it finally came.
Split into simpler sentences: Nicholas' heavy-handed actions in the "coup" crisis irreparably damaged his image (already battered from previous policies he had pursued). This, in turn, caused many of his subjects to eagerly embrace the next revolution when it finally came.