Complex sentence: With "Regeneración" (Regeneration) period and the creation of the 1886 constitution, the centralist regime only managed to aggravate the political problems, which some "departments" soon began to complain about to the central government.
Split into simpler sentences: With "Regeneración" (Regeneration) period and the creation of the 1886 constitution, the centralist regime only managed to aggravate the political problems. Some "departments" soon began to complain about these problems to the central government.