Finally, you have no right to say that we "did not reach our target figure" since the whole event was considered to be a success by many people.

have 是动词，表示"拥有"或"具备"。 no 是形容词，表示"没有"或"不"。 right 是名词，指"权利"或"正当权力"。 to 在这里是介词，表示"对...的"或"关于...的"。 have no right to 是一个固定短语，意思是"没有权利做某事"，表示某人缺乏做某事的正当权力或资格。