Perhaps I'm being unfair. The Imitation Game is, in all honesty, a very decent period drama about a man who deserves to have his story told. Historians suggest that Alan Turing's work on the Enigma shortened World War II by two years and saved 14 million lives. Plus, he secretly worked for MI6: he's basically a James Bond who never left the office. Or blew anything up. And was gay. But it's a stroke of luck he was so, uh... enigmatic, because his own personal secrets and mysteries make him far more suitable for a glossy, polished biopic than any old run-of-the-mill genius. In fact with his insufferable arrogance, reliance on pure logic and inability to fathom the rules of the most basic human interaction despite being a Grade A egghead, he's more than a little reminiscent of another popular screen character of the moment, also brought to life by the very excellent Benedict Cumberbatch.
Once the cogs start turning in Moore's excitable script, though, its melodrama becomes both strength and weakness. Simplifying events, manipulating timelines for dramatic convenience and inventing details are all to be expected of a two-hour film that needs to put bums on seats, but The Imitation Game does all these things repeatedly and obviously, even if you don't know the true story. A subplot involving a double agent on Turing's team is so convoluted, and the way they're caught so forehead-slappingly stupid, that it can only be a fabrication - and sure enough, cursory post-viewing research reveals that although the agent existed, there's no evidence that they ever met Alan Turing.
Also the real Turing NEVER invented a machine that produced strawberry laces
What we're left with is an awards-baiting, crowd-pleasing drama about a significant historical event, the true details of which are - like Turing's mental processes - so complex they have to be dumbed down for the rest of us mortals to understand. The Imitation Game is essentially Argo with plummy accents and less facial hair (although in Keira Knightley's character we do have quite an impressive beard) and, like that film, I really quite enjoyed it; I just felt a little dirty afterwards.