So I'm not sure that this is the right place to say this, nor should I be the person to do so, but everyone else is tiptoeing around and since I'm leaving the continent soon anyway I'll bite the bullet here.
There is a conversation which has desperately needed to happen in this guild for at least the past year or so. Because people haven't been able to have an adult conversation about it, resentment and awkwardness have eaten in to people's fun to the point that a number of long-term guild members have considered stepping away, and now we get to the point where one of our longest standing and most committed friends is publicly leaving. This has symptoms including but not limited to the falling numbers, failing raids, the lack of BoTmeets and the general malaise that has afflicted the guild.
We can do a history lesson here and trace it back, but to a degree that's not the point and it's not healthy to start this by opening up old wounds, even if that might be part of the healing process. Looking to the present and future, the issues now boil down to a number of things:
The social element of the guild is dead. There exists two groups of people, one on the discord which has semi-active chat, and a smaller group on the forums and TS which are functionally dead. People don't log on to chat, showing up basically for mythic runs and that's it.
People are being pushed away. Long term friends like Sharp, Lei and others feel unwelcome in the guild, people get aggro over minor things and knowing that you might get lashed out at at any time makes people just decide they'll have more fun in another environment where they can jut relax and enjoy themselves. This has lead to a lack of people which in no small part has caused raids to stop.
Disagreement over level of commitment and effort. Mythic+ runs at 15+ are not easy. To complete these in time is a real challenge as it is supposed to be. The game offers many easier ways to get gear and to see the content if that's what you want to do, but people are frustrated that runs go south a lot and its often due to easily corrected but mistakes the persist week on week.
Please, can we at least try to have a conversation and address this. Let's not let silly high-school drama tear apart the guild and friendship group that has existed for so long and brought so many of us together. This is not going to be an easy conversation, as the divisiveness and bitterness has sunk in over time, and will require people to be open and to take honest criticism on the chest without lashing out in anger, but it has to be a conversation we have if we want there to be a Bottle or Tree in any meaningful sense by the next expansion.