Complex sentence: The Gorkha rulers destroyed the historical places of Doti and hide its brave history for a very long while, not only even that no Dotyali people were given priority in any types of national interest, they also were excluded from the Government jobs and other state facilities.
Split into simpler sentences: The Gorkha rulers destroyed the historical places of Doti and did their utmost to hide its brave history for a very long time. Not content with that, the Dotyali people were never given priority in any type of national endeavor and were also excluded from the Government jobs and other state facilities.