"it certainly doesn't mean Haig was a good general."

Good enough Raggy to command, plan and execute the most successful offensive campaign ever conducted in the history of the British Army which in only 100 days completely routed the German Army facing him and ending the First World War - That German Army, which in 1914 was considered to be the best in the world, Haig defeated it with Great Britain's first citizen army - good General? Certainly better than any he was up against and his record speaks for itself - something you would have known if you had bothered to read up and study it.