Play games
Choose the game that interests you and play itfor free.
Complete the quests
Every game has some quests for which you will receive Soul Gems.
Receive rewards
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
When you are winning your lane, but then kant deal enough damage to kill e.g enemy mid-laner. Is it your fault, that you are not too fed, or your mid is trash and feeds?