Ranked is so stressful.
There's always that person that makes that bad play that you know could have been performed better. There's always that person that AFKs. There's always that person that trolls because they didn't get their role.
I think this is the most frustrating thing I've come against in my life of League. It really sucks at how other people can make your elo drop so easily. I hope Riot fixes this someday.