For me I dont think it's become more boring, I just think it's a different game to what it used to be. I started watching Oxford in 2003, so my first few managers in the first 2/3 years were Atkins, Rix, Patterson and Oldfield as caretakers, Diaz and Talbot. Diaz aside, not only was the football mind-numbing, but the standard was absolutely woeful. And apart from the first half of 03/04, we were generally an awful team too. There's no way that football has become more boring since watching a 0-0 at home against Keith Alexander's Lincoln Rugby team in the depths of Winter with Paul Wanless and James Hunt running through treacle for 90 minutes. I'm not quite sure why 15 year-old me kept coming back for more after that, but I did.
The standard in the lower leagues has become way better as more and more people across the world try to forge a career in English football. What has been lost is some of the blood and thunder physicality combined with a level of honesty, so now it feels like there is more onus on a technically good game of football for actual entertainment. There's less throwing it in the mixer to compensate for more limited abilities and terrible pitches, so if teams cancel each other out in playing a more possession based style the game can feel slower. But that increased technical level also has a huge upside for when it's played well, and we've scored so many goals in recent seasons and had matches I could have never dreamed of witnessing back in 2003.