Theres absolutely nothing I can do

Silver 5 0 lp for over a week due to rage quits. I have seen nothing but people complain and complain about everyone else sucking. My last match....I was zed agaisnt cass and I couldnt take her head on so I made it a farming lane dodging her q's and what not. BUT THEN OUR FUCKING ADC comes in and starts fights there costing me 2 towers. I say "hey man just leave mid be im slowly winning it." she responds with "are you fucking stupid im carrying look at my kd" (which was like 7/2 but I knew that team fights would be rough they had sej) so then...we keep team fighting and we start losing. Im keeping my cool and trist is raging "if I have 0 peel its gg" and then dies AGAIN due to not staying with her support. she rage quits as with like a 9/4 kd and comes back AS THE NEXUS IS DESTROYED SO SHE DOESNT GET LEAVER BUSTED :) WHAT THE FUCK DO I DO I keep losing due to idiots with ego bigger than their elo. ANY HELP WOULD BE APPRECIATED. --- In Your bed