Also a big and important role is to help out the team and keep them motivated. Let's say you're in a losing spree of 3 - 4 rounds, motivate them, tell them something good like guys pull it together we can win this. Morale is a very important thing especially when you're trying to win games at your own skill level. Don't get distracted by people who blame each other, motivate them by pointing out certain location on the map where they should move / keep. If they can't hold / attack a site, try something else, change something in their playstyle it always helps.