I am no fan of Jimmy's show but this seems out of line. My tinfoil hat thinks this might be a way for Sinclair to "justly" remove a show that has been loosing ratings by riding the popular wave and saving some face.
That data appears to be nonsense based on "online audience engagement," not viewership. According to that very source, Jimmy Kimmel is the #6 tv show as of today!
According to sites like https://televisionstats.com/s/jimmy-kimmel-live he wasn't even in the top 500 TV shows
Band of Brothers a show from 24 years ago still gets more viewers that Jimmy get's now.