the match making

the rank match making is insanely unfair. I have no idea why every 2 or 1 game I just get 4 of my teammates getting shit on. Its's not like only 1 or 2 people getting shit on in 1 team but all 4 of them. i have a yasuo support who went 1/9/5. and a jg went 5/6/3, mid went 1/5/3 and adc went 4/9/4 I have no clue how I should carry the game. the system is treat us like we are challenger and we can carry 4 bad teammates against 5 decent players. Can riot game change the system back lol.