quantum field theory - Is there a mistake in a QFT textbook? - Physics Stack Exchange

I tried to calculate one of the problems in the textbook Gauge Theory of Elementary Particle Physics by Ta-Pei Cheng and Ling-Fong Li. On page 248 you can find the following calculation of a loop

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Relativistic quantum field theory is wrong.

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homework and exercises - A question about a complex integration in Peskin's QFT textbook - Physics Stack Exchange

Quantum Field Theory: A Modern Introduction: Kaku, Michio: 9780195076523: : Books

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What is the most difficult book to learn quantum field theory? - Quora

How does Quantum Field Theory (QFT) redefine our understanding of the universe's cosmic tapestry? - Quora

Why does Schwartz in his textbook say that quantum field theory is a mess? He says its foundations are flimsy and many derivations are unsatisfactory (Paraphrased) yet he said it explained a

quantum field theory - What is the missing part of the argument needed to justify the claim of (2.52) in Peskin and Schroeder's QFT textbook? - Physics Stack Exchange