Some real damage was done with three consecutive 3 win seasons. I wish that were not the case but sometimes it is not just the discouragement of bad play but the breaking of a habit. I had been a regular Braves ticket holder for many years until the year the season was canceled due to the strike. Once I got out of the habit of going to games it was amazing how much else I found to do with my time.
What I'm about to say has taken some years for me to admit. It goes against the optimistic narrative you suggest i.e., the issue is due to this coach or that coach.
The stark downtrend started on the tail end of CPJ, pre-Collins and pre-Covid. Remember our home game vs Virginia in 2018? 37k tickets sold. Probably not 30k in the stands.
In some ways our struggles are emblematic of broader CFB attendance trends. A lot of fans did not return post-Covid and with the increasing relevance of easier, at-home watching. Ok good, we're not alone.
In other ways, it at least appears to me as if our issue has become more acute and the bottom has fallen out with respect to our fan base's interest. It is depressing for me to think about, live through real-time in the stadium, etc. I enjoy bringing new fans to games, however the atmosphere and experience has deteriorated to the point where it is harder and not as compelling for me to make those efforts as it used to be. There was not only no jolt from the Key hire, attendance became worse.
Our apathy/lack of interest hit me like a sack of bricks last Saturday. It was the worst showing I've ever seen in my GT fandom. Maybe someone has numbers that put my mind at ease. I'll still do my part for myself and family - I still enjoy the mental escape and pride in being there.