The following is a Watchtower's criticism against Newton:
Down through the ages, talented scientists have indeed made surprising breakthroughs in their search for answers to puzzling questions about nature. Some, however, have also made serious errors in the process. Isaac Newton was one of the greatest scientists of all time. He showed how the force of gravitation binds the planets, stars, and galaxies into one universe. He invented calculus, a branch of mathematics used in computer design, space travel, and nuclear physics. However, Newton also pursued alchemy, a pseudoscience that used astrology and magical formulas in attempts to turn lead and other metals into gold.
Yes, Newton was not perfect, but at least his contributions are still in use in many fields, nevertheless, there is no Watchtower prediction without fail. Also, the book (The Bible), by which the Watchtower bases its doctrine, teaches that the earth has four angles.