I totally agree about Echo, but I will say that she also attempted to kill Octavia, even thinking she did for a bit. Octavia only knows that side of Echo, she doesn't have the in-between moments the other characters have had throughout the seasons. So add that on top of the conclave, I actually do understand where she is coming from and why she isn't over it. She's just reacting personally and while valid, sometimes as a leader that might not be wise.
Yes I know Octavia is crazy right now but at least she isnβt stupid. When Bellamy was crazy he killed people in their sleep. When Clarke went crazy she killed children. Octaviaβs crazy arc>