Why are you compelled to misinterpret the truth? https://www.bizjournals.com/newyork/news/2017/10/24/is-oversaturation-the-reason-nfl-ratings-are-down.html 

“There is a small decline for the NFL,” Lazarus said. “What we’re seeing is that prime time for the rest of television is declining more than that. Sports is still dominated by live viewing.”

Direct response that addresses and debunks your second link: https://www.seattletimes.com/sports/seahawks/trumps-attack-on-nfl-plysers-seems-to-have-no-effect-on-ticket-sales-despite-reports-to-the-contrary/ 

Interestingly the first line in your third link refutes your assertion that ticket sales are down, "While ticket prices to NFL games remain relatively unchanged overall, there is mounting evidence the league’s brand is taking a significant hit." Oh and the hit is the "polarization of the brand." Which was polarized by trump. This is obvious from these threads and does not dispute anything I have asserted.