A simple but SUPER IMPORTANT PSYCHOLOGY FACT that will 100% BOOST YOUR RANK!!!
When humans make a mistake, we tend to associate our mistakes to external factors. "I failed midterm cuz I didn't get enough sleep" or "i got killed by enemy champ, but he just got lucky it was so close" or "I cant help any lane because i got invaded and now im behind, i keep getting killed in jungle cuz team doesnt help me ward for invades, no teamwork"
When humans see other people make a mistake, we tend to associate that mistake to that person itself. "He failed midterm cuz he wasnt smart enough" or "he got killed cuz he was too dumb to not overextend" or "Jungler is just a trash player because he failed to help out with my lane and kept being outplayed by enemy jungler. REPORT PLEASE FOR BOOSTED!"
Understand the power of the situation, hopefully we can all understand each other better and make the community less toxic. :)
And Yes, so and so on your team probably could have done better, but focus on what mistakes you could have prevented and how you could have played better. Your skill level is the INDEPENDENT VARIABLE. You cant win every game, but your win rate will improve if you stop the blaming. If your skill level is there, you will climb no matter what, every lose streak will only be balanced out with a win streak, its a mathematical certainty.
The League community should stop with the toxic blaming and insults. No one is perfect, we all make mistakes, all have good and bad games, but constantly whining about other people's mistake will for sure drag your rank down from where it could have been. Chill out, if you win you win, if you lose you lose, not that big of a deal. 2 facts, you cant win them all, it is a team game. But you will climb no matter what if you got the skill. And best and fastest way to improve your own skill is to stop whining about other people's mistakes every game and focus on how you could have maximized your game impact. Concentrate and play, if you got to lose you lose, but when you focus only on self improvements that will increase your skill lvl and your rank 100%. :)