When the entire 3 men-party crew are feeding

I'm lost for words how to handle the amount of feeding from these 3 men party crew. Sometimes this game really gives me cancer....Zac jungle dc-ed for almost 10min. While bot Vayne is feeding Nami ADC then Braum top is feeding Riven. While I'm against Anivia as Talon tried to carry so hard for the team. Vayne with no armor and MR literally one shot by Anivia and dare to insult me for being a dirt divison. All 3 Braum, Vayne and Zac are nothing but feeding and making my job even hard to carry.