>>9285600She talked about the model change beforehand, she probably figured she had to get the whole story out first since people will inevitably ask why/how/what regarding the change.
Considering she was already somewhat emotional since the start of the birthday stream I guess not much stops her from venting about the past (which is around last year) and the circumstances around it
I'm certain it's last year, because nacho's last twitch stream was in april, in fact its the very stream where she draw that kana pic (which kana said is her favorite fanart in her own twitch stream), so I figured the stream that she talked about being ignored about had to happen a long while ago.
And this was also the time when she had a shitty manager/mod team (one of the reasons why she left her original group), so who knows how the entire thing actually goes.