THIS ^
THIS ^
THIS ^
The OP can bring up however many anecdotal examples of "people around him" "shaking their heads" or saying "is it over?" that he wants, but I'm sure any number of people could come up with examples to the contrary.
In the beginning, almost everyone who went to a drum corps show loved drum corps and was a fan. Now, the activity has changed, so you have people that liked the older style better combined with people that like the newer style. This didn't exist "way back when" because there was no "older style". You can say you liked it better back then, but that doesn't mean you're right, or more justified in your opinion. Especially when the argument is based on "trust me, I saw these people act this way" and "I didn't feel good about it, but back then I used to".