Need advice from high elo players...

I honestly don't know what to do, 90% of the games I've played in the last 2 weeks (if I've been in a solo lane) I have won my lane but am unable to do much afterwards due to how much the rest of my team feed. By winning lane I mean the odd kill or two and always higher cs. Unfortunately i'm not even over exaggerating regarding the amount of games this has happened to me in the past 2 weeks, I've never ever had such a high amount of defeats. So what I want to know is just tips on what to do when playing against fed champions, I know I can obviously play passively and wait for a mistake or a good engage but with the teams I've been getting that's unlikely to happen.. Pls help..
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