Very close to ranking up

Is it just me Or every time I am one game away from raking up we get a team which has 2 losing lanes constantly. I am understand that you need to be the carry at times but this is so stressful.

It does not help that you have to keep babysitting your teams mental telling your team that you are a four items graves and they just need to peel you in teamfights.

Is it just me being unlucky as this has happened a lot with me Or it happens to others as well.