Your game ratings (C-S+) doesn't depend on your Kill Death Assist Ratio (KDA Ratio) but also vision scores, objectives scores and minions killed. *KDA Ratio = (Kill+Assist) divided by Death *Perfect KDA will appear if you have no deaths on a game. But it doesn't guarantee that you will get an S+ on that game
You can cancel autoattacks with S Button. Use it wisely.
You can press Smart pings like "Area is Warded" or "Enemy is missing" for your team. Just check those smart pings on the settings in communication. Don't spam "Enemy is missing" pings on your team mates.
When you are a jungler, do not stay forever in the jungle camps or monsters. Try to make an impact/gank on the lanes. You must be creative in ganking lanes. Make sure that you are not spotted by enemy's vision before ganking. Also secure objectives using control wards.(edited)
You can cancel autoattacks with S Button. Use it wisely.
You can press Smart pings like "Area is Warded" or "Enemy is missing" for your team. Just check those smart pings on the settings in communication. Don't spam "Enemy is missing" pings on your team mates.
When you are a jungler, do not stay forever in the jungle camps or monsters. Try to make an impact/gank on the lanes. You must be creative in ganking lanes. Make sure that you are not spotted by enemy's vision before ganking. Also secure objectives using control wards.(edited)