More feeders in flex

I think flex is harder to climb in as a solo player in support role because there are too many feeders. Don't get me wrong I can climb, but it's a lot slower than my solo/duo climb and I'm just curious if others have experienced the same thing.

Most of my games are ending something like this https://snag.gy/JKEVa1.jpg . In the game before that my yas is down 1/4 against their darius in 10 minutes along with a fresh level 30 ashe. The game before that I had a feeding taliyah jg who obviously didn't know how to use the pick with an autofill adc who gave up within the first 10 minutes. Before that a 2/10/7 ori who lost lane to an annie. Game before that got an adc who once again was sleeping or something in lane and got hooked every single time he came to lane. Game before that one, my team won thanks to a 0/9/2 feeding top laner on the enemy team. Before that one we won thanks to a sleeping adc on the enemy team. Lost the one before bc our top laner wouldn't stop feeding, gave first few kills and ended with 17 deaths.

I'm just going through my match history and there is invariably someone hardcore feeding their ass off every single game 100%. It definitely wasn't like this in solo/duo for me. What is it about flex queue that makes so many people feed so hard? Is it that matchmaking is more volatile?