Because his reputation from acclaimed products (Populous, Black & White, Fable 1) are all long in the past and his latest games were nearly 90% cons.
And even his great games are not what he promised. Even there he promised more than he could deliver.
I mean already Black And White wasn’t up to what he promised. And for Populous I don’t know, because I wasn’t following gaming news then, but needed to learn to read first =D