I've read most of the replies here, and i appreciate and support fnatic so i'll put my 2 cents in, I think, It's less about skill chemistry etc and more about their mentality, it seems to me like the "honeymoon" period and getting a new player in made them think "okay now we can win again" or something along those lines, when before they just think "ok we are losers" and when they end up losing again, they think they are losers again
Example for Boaster: I remember hearing about a situation where they were having a tough game, and boaster pulled the boys outside and asked them if they were losers and that everyone was hella down at that point, and they almost believed they had already lost, and teams like that are in a rough spot generally, because that becomes a habit unless boaster pulls them outside and reignites the flame, and everyone who has ever been an igl or a coach knows that's hella fucking difficult to do, i believe for the game he did it they ended up clutching up and pulling it back afterwards
I'm going to bring up another situation here which is arguably irrelevant but, it's optics undying mentality, even though they start off bad, they know they are the best in the tournament, they know they can pull this game back, they get that reiterated to them by their coach, and they go out and stomp a 4-8 half into a win, u need to genuinely believe even if it's untrue, that your team is the best team in the tournament sometimes.