“差劲的服务”可以翻译为 "poor service" 或 "bad service"。这两个表达都广泛用于描述服务质量低劣、不令人满意的情况。例如：
I received poor service at that restaurant. （我在那家餐厅受到了差劲的服务。）
The hotel provided bad service, and we were very disappointed. （那家酒店的服务很差劲，我们非常失望。）