You may be up to something.
I would say the cancellation of the AR concert marks the starting point of declination. Before that though, they only had good news to offer, like Lazulight 3D debut (which happens before Myth btw) and of course the announcement of the concert itself. Meanwhile, Hololive, at that time, announced Tempus VG, which whether you like them or not, was probably the most "controversial" debut ever.