Finborough theatre, London Titas Halder’s raw solo play relays one young man’s feverish struggle in the face of racism, deftly played by Amar Chadha-Patel in his stage debutTitas Halder’s striking new one-man play is about a young British Asian man, A.K., growing up in Britain and experiencing increasingly brutal incidents of racism: bullying in the playground; casual jibes at work; parents who no longer feel s…