A single game demoted me more than an entire league

Just that. Sorry if this doesnt belong here but I looked around and didnt know where else to put it. I heard something about having to play 1 more game to help fix the bad placements (I already ended them, in gold 5 with a 7/3 from plat 5). Then played some normal games in flex que. And now, I just played this game, which I lost. The total counter adds up to 9/10, but COUNTING THE NON PLACEMENTS GAMES. Its all I can think about, because, oh, surprise, one game lost? You're now bronze 1!!! And even if we considering counting those games as correct, which would be total bullshit because I wasnt warned about it, bronze 1? for real?

That would mean nothing less than getting down more than 2 leagues for getting a 45/55 result or something like that, are we insane? And I'll repeat, thats not fair at all anyway, my real placements are 7/4, in any case. Hell, in those games afterwards I even got a disconnection and my team did a remake. I mean... what the hell.

I'm not trying to be disrespectfull, but is this gonna be fixed somehow, or what? And it's going to have impact on solo que or my solo que placements will be taken into account with plat 5 in mind? Just wanna know the oficial statement on this because I find it a bit outraging.