Kog'Maw is broken
Summary
Our team was ahead as hell, at least more than 2 times their kills, more turrets, more dragons, more overall gold, spread around LeBlanc, Lee, Kali, and Mundo. The enemy team managed to get 8 turrets within 3 minutes, because of Kog'Maw. Look at Kog'Maw's score. As soon as he bought rageblade, he had the power to 1v1 Kali and push down inner, outer, and inhibitor turrets, while the rest of the team got mid outer, inner, and inhibitor turrets. It came down to defending the base, and "Protect the ADCarry" was the theme here. Once everyone was dead, except the ADCs, Kog'Maw single handedly with his 2/7, 1v1ed Kalista. He kept up with farm, and eventually, he had more gold than most people on our team, and the same gold as everyone else except Blitzcrank on his team.
Conclusion
Kog'Maw or Rageblade needs a nerf/change. This is completely insane as a single champion has pushing power like no other, only requiring 1 item to be able to be the split in the game. When he is threatened, he will hide behind the tanks, doing massive damage. I believe this an unhealthy playstyle and goes against Riot's beliefs. According to detailed league information sites, including lolking and champion.gg, Kog'Maw has an average of 54.4% win rate, with Udyr at the top standing at 55.5%.