Everything taken in totality over the last 20 years, that now includes a name change that most of the fanbase didn't want, and it is not too hard to see how this can happen. I know this isn't the brand thread, but that is why it's so important to get that right. Some fans are gone and they are never coming back over the name change in combination with years of suck. We are also just starting to come out of a pandemic, and the residual effects of that which is not going to help the situation either. As for many of the long-time fans of the team, I would imagine for many there is very little emotional connection left, because they don't really recognize what they are seeing on the field.
They need to do something with the branding that will engage the current fans that remain and bring new people into the fold. Most importantly, they need to win more.