The Pit, Barbican, London Finn Beames and Company's show is overwrought but features a fine performance from Oscar-nominated actor Ruth Negga, playing a queer boy struggling to fit in A string quartet in school uniforms scrape their bows along the edges of swords while an adolescent boy in the foetal position recounts his fear of the school bullies waiting to make fun of his breaking voice. Quiet Songs, the debut sho…