你断句错误，误以为主句是现在完成时。其实主句和从句都是一般过去时。than they “should” have是比较分句，该分句省略了实意动词won, 补全则为than they should have won. 主句的主谓结构是：Clubs tended to ...。that won more than they “should” have 是主语clubs的定语从句。whereas引导对比状语从句，从句谓语为一般过去时got their just deserts...。