Indeed, Young Master Shui yelled at him, "What are you shouting for? I'm not deaf." In reality, that person had already kept his voice quite low, fearing that Young Master Shui, having been stifled by Xiao Yao, would vent his anger on him.
To all appearances, these people were friends of Shui Youran, but in reality, they were his punching bags. When he was pleased, he would praise them a little and grant them some benefits. When angered, scolding was the lightest penalty they could expect; more severe could mean getting hit or kicked. If he injured them, he would compensate them for their losses, and they were willing to endure the abuse.