I don't think it is dead just because WWE gets 3 million viewers on Raw and 2.5 million on Smackdown doesn't mean it is dead since we have independent wrestling like ROH, NJPW, and many more wrestling companies. Now ROH gets an approximately 420,000 viewers while TNA/GFW get around 600,000 viewers and NJPW getting around 200,000
Link for viewership chart
TV Ratings & Viewership: WWE, ROH, TNA, Lucha Underground & NJPW on AXS
Link for viewership chart
TV Ratings & Viewership: WWE, ROH, TNA, Lucha Underground & NJPW on AXS