DISADVANTAGES OF ONE PARTY SYSTEM by keypoint It encourages bad rule. It leads to the victimization of opposition groups. It perpetuates bad leadership in office. It can lead to the unpopularity of a regime. It can lead to dictatorship. It is undemocratic. Others are Viewing: DISADVANTAGES TWO PARTY SYSTEM DISADVANTAGES OF MULTI-PARTY SYSTEM ONE PARTY SYSTEM ADVANTAGES OF ONE PARTY SYSTEM TWO PARTY SYSTEM MULTI PARTY SYSTEM ADVANTAGES OF MULTI PARTY SYSTEM