Well for one, can talk about how it completely humiliated Germany. The treaty cut Germany's boundaries (giving much of the land to Belgium, France and other countries), demilitarized Germany and only allowed certain types/classes of weapons, stripped the growing country of all its colonies, established Germany as the reason of the First World War, and imposed financial obligations including a numberless amount to be payed back to the other European allies in reparations. Which they could not pay. Because it went up to about $130 billion. This caused the German Motherland to go into a Great Depression with economic chaos, unemployment, and very very angry Germans.
This great (not) treaty actually paved the way for (enter left stage) Adolf Hitler and his gang of Nazis.