https://screenrant.com/big-bang-theory-worst-episode-prove-biggest-sheldon-leonard-problem/

The Big Bang Theory's lowest-rated episode proved that the series had two major problems, and Sheldon and Leonard were responsible for both of them.

IMDb ratings are meaningless in my opinion, and in large part, that's what this article is based on. Anyone can join and contribute to specious "ratings."

It's very common for someone to give an episode the lowest possible rating just to be a jackass, what does that "prove?" I would not draw conclusions based on IMDb activity.