Just lost a macth

When we had 6k gold lead and just took inhib, because my team wouldnt turn when they contested Baron. Our jungler wasted smite on Jungle camp when we were taking. You turn when the enemey team arrive with their jungler, you dont focus the baron then lose it the enemy junglers smite! Im sick of this stupid games matchmaking. I have monkeys throw my matches so climbing is such a grind.