IoSonoNeon while i understand that this situation sucks for you team, it is very clear to me that Maybca thought The Strap denied the BO3 suggestion with "i don't mind bo3ing" in the screens you uploaded. Because Maybca doesn't have english as his first language, he most likely simply thought "i don't mind bo3ing" meant "i don't want to bo3", which is why he posted the win right after game 1.
Also, you said that Maybca was pressuring The Strap to play early, but based on the screens on your 1st post, i don't think he pressured The Strap at all, he asked once if The Strap wanted to play earlier than the scheduled time, The Strap answered the day after while Maybca was in a game and asked The Strap to wait for him to finish his game. While i think you have the right to ask for a redo of g2, i think you are overreacting about Maybca's behavior.
I hope my post helped you see a situation where Maybca misunderstood The Strap rather than Maybca being disrespectful towards your player and your team