Another flex game ends in sheer misery

The game ended 1 kill vs 28 kills. Every lane lost. The game was totally one sided. Our jungle literally had no clue what he was doing; I've seen better bronze 4 players than him. This is at gold-low plat mmr.

This happens 9 out of 10 games. Seriously, it's that bad. Please fix this system. It doesn't work.