I consider it a bit of a non-question tbh. He was not allowed to do the job for which he was hired imo. The players and fans made his position untenable based on a combination of their preconceptions regarding him and a set of unrealistic expectations - they never attempted to work with/for him in any way that could allow success. Their attitude became a self-fulfilling prophecy - so I don't think we have any real idea how Woy might have done if working with realists. In terms of your question there was never a job that Woy was allowed to do.
I've felt for ages that what 'poo fans could never forgive was that he portrayed how bad the club was far more accurately than they could bear.