The complaints are not that the book isn't nice enough towards Jobs, but rather that Isaacson doesn't know enough about technology to make this interesting or insightful, nor did he try to educate himself before writing this book. Isaacson is at his best when he dives into the more human and social aspects of Jobs's life. As soon as things get remotely technical, the book begins to fall a part. He misquoted Bill Gate…
The fact of the matter is, though, that the nitty-gritty technical details are just not part of the picture for Jobs. Jobs picked at tiny details only when designers and engineers did something wrong or did something didn't lend itself to Jobs' greater artistic vision. If you're interested in exceptional technical detail, Jobs just would not have been your man.
And let's face it, if you're interested in the technology. there will be dozens of engineers and a limitless number of other writers that can write about those matters later. Gross technical detail is just not seeing the forest for the trees; and if you don't realize that fact, then you are someone that would have probably have been met with Jobs' scorn.