This game doesn't punish enough players for not playing objectives

Seriously. I just got a game, no kidding, where mid was sieged by 2 enemy players and my 4 team mates chased a 2 kills bot for 3 minutes while the 2 players almost destroyed the nexus. This is the level of players in silver and is horrible to get such teammates. I feel sick that they are in silver. I felt sick, i pinged, i caps in chat but they still chased letting the base fall. It's amazing and sickening

I think this game should punish people more for not playing to win the game, just chasing stupid kills and doing flashy 0 impact plays. People who let 3 turrests and 1 inhib fall just because they chased kills should never win a game