It may be time for you to order Mark Srednicki's quantum field theory textbook. Amazon.com guarantees the lowest price once you receive it in January.
The book has been praised and celebrated by many people including Ann Nelson, Joe Polchinski, Wati Taylor (plus a few others, see the Amazon.com webpage), and readers of this blog. I am sure that most readers of this blog have already understood that the negative feedback from a certain notorious person is unjustified by anything.
This person hasn't seen the book and he is just emitting untrue ad hominem attacks against all physicists who are not afraid to say something that everyone knows, namely that this critic is not worth and capable of a serious scientific discussion.
See a list of other QFT textbooks.