Stark's book, while polemical and shoddy (in a non-trivial number of places), is not really any worse than much of the literature he sets out to make straight. A significant number of works that are often cited as authoritative regarding the historical issues Stark focuses on, end up citing patently inaccurate accounts from the 19th century. For example: for whatever reason, a non-trivial number of authors from the 20th century were completely fine citing 19th century works as primary sources, even though the events under discussion happened many centuries before then, and so were necessarily secondary sources.

The right take away after reading Stark is to become skeptical of a non-trivial amount of historical scholarship regarding the issues he covers, and skeptical of Stark as well.

Joseph Needham is hardly a fount of objectivity and lack of bias too.