How do you carry yourself out??

When i first started ranked I was not ready. So I was placed in bronze 5 with good reason. But I came back to play because I got better. And I have done well in every game that I have played, Even in my last 3 games I did alright. I got up to 78LP and then got a game where my team died 67 times and the other team was feed so much there was just nothing i could do. Then the next 2 games It was 4v5 AND my team was feeding. Losing those 3 games put me down 17 LP. So how do I carry myself out? I mean, I can not just sit and play 10+ games a day until I get the right wining streak. What do i do? I want to start playing with people that play smart and safe. I understand people will make mistakes. We all do. But when they do the SAME thing over and over even though it has killed them every time before. I want to get to a rank where that is not a thing.