Coach retains fans’ goodwill but the way his side flirted with humiliation against Tottenham was ominous for a man aware of the harsh realities of his profession Slaven Bilic knows how it goes in his line of work. Once a manager is in danger, once the narrative becomes entrenched, it can begin to feel like the long kiss goodbye. “Once that’s opened, then it basically doesn’t stop,” the West Ham manager said after his team’s 3-2 home…