[Matrixbeast]

Well, to be fair, a lot of adult Sentai fans did find that one special Sentai they hold in their heart that they felt went above and beyond what most Sentai put out.
So when a new Sentai comes out that they feel was completely lackluster, then another comes out that they feel never gave them something above mediocre, and on and on, it could feel that things are on a downward spiral.
For example, I got bored of Go-Busters early, I was disappointed by Kyoryu, I thought ToQ was dumb, and Ninnin was just not engaging to me, so that's 4 Sentai in a row that I just didn't enjoy.

I will agree that the complaining has been going a little too far, but after watching shows like Gekiranger, Dairanger, and Jetman, I feel Sentai can do so much more than having heroes screaming in front of the camera. So when I watch a current Sentai that doesn't live up to the standards Toei has already set with Sentai past, it can be a little disheartening.