Such a Great mmr system

so my team had 2 unranked players,2 silver ll, and 1 silver 4 and the other team had 3 goldies, 2 silver's 1 and 2. Annie goes 0/10 by 20 min as well as 0/7 caitlyn and a 1/8 fizz. Idk how the mmr system is working but right now it was messed up