原來是其他客人早就看不慣這個問題顧客的行為，因此以鼓掌來支持經理的做法

原來是其他客人早就看不慣這個問題顧客的行為，因此以鼓掌來支持經理的做法。

結果 (英文) 1:

It turns out that other customers have long been unfamiliar with the behavior of the customer with this problem, so they applaud to support the manager's approach.

結果 (英文) 2:

It turned out that other guests had long been unaccustomed to the customer's behavior on the issue, so they supported the manager's approach with applause.

結果 (英文) 3:

It turns out that other guests have long been disgusted with the behavior of the problem customers, so they applauded to support the manager's practice.