I find that the majority of my wins occur when the other team loses a member, and the majority of my losses occur when some random lvl 30 gets matched with me and carries the other team.
What I mean to say is, most of my wins have been pure luck, and most of my losses we get steamrolled by a carry. This results in me gaining levels quite quickly and getting matched with much harder opponents, without having many good, full 5v5 games to get better in.
I honestly feel like my summoner level is going up way too fast. Is this normal? What should I do? Should I keep playing on this account or just make a new one so I can be a lower level?