Perhaps the foundation will continue to exist, but it has lost all credibility, and is even more invalid than it was when it started. Combined with a bunch of members leaving, that's pretty much a collapse.
No one is going to join or donate to the bitcoin foundation anymore.
Every volunteer organization goes through schisms. That's why after a thousand years we have nearly
20k 40k Christian denominations. BF will survive and grow. You are welcome to start your own. Then we will have two in six years.