I would have said the attitude of Member #3 might be crucial to this . . If you decide the antagonism from #2's reached the point where you don't feel it's worth continuing then it's time for the "move into civilisation or we'll find a replacement" ultimatum.

However only you can decide if you've reached that point.

And if #3 is not supportive . . . then I'd suggest you start looking round for others to make music with.

Good luck - you've clearly more patience than I have!

George