Please don't use the word rape flippantly. They were beaten in lane. thank you.
Maybe you need an attitude adjustment, its a team game winning is not just about you winning your lane. you need to have map presence, control objectives and if you are as good as you think you are, you should be able to convince your team that you are the best shot caller and get them to follow you. You need to communitcate in a friendly and helpful way to achieve that though, raging helps no one.
So perhaps your mechanics are platinium but your teamwork certainly isn't.... you have two choices improve your teamwork or play only in premade teams where you have more direct control over your teammates.
I went 9-1 in promos before, in some of those games there were feeders, sometimes that feeder was me, but with control I can reverse the early feeding and start hitting objectives and ganking. losing lane doesn't mean losing the game but too much focus on winning your lane after you have already won it at the expense of helping other lanes can definately lose you the game.