you're comparing the viewership of a show airing now to a show that premiered in 2008 and ended in 2013. it's insane even before you take into consideration the rise of streaming and unlimited personal device access

it would be like comparing the viewership of the first season of house of cards (2013) and wednesday. netflix had around 30 million US subscribers in 2013 and has approximately 74 million now. you also need to factor in that it's building on an existing fan base from the game which won't be an enormous viewership bump but it would help

basically it's pointless to compare them in this way