Question: How accurate are the science lessons on the show?
Question: Why was the first season of this cartoon received so negatively?
Answer: Gleaned from the Internet: Some critics criticized the premise of so many one-off battles that were introduced and concluded within one or two episodes. Others felt the first-season plot lines were overly simplistic and never progressed or developed through the season. Also, the rivalry between Iron Man and the Mandarin also failed to capture viewer's attention.
Answer: In general, quite accurate as that was the point of the show. To teach kids about science. As the show is now over 20 years old, some facts have changed as we're always discovering new things. For the time, it was as accurate as it could and much of it is still accurate now.
One thing I think the show gets wrong is the idea that electrons stop moving when you break a circuit. Electrons never stop moving.