I don't feel very strongly about this, And there's a very simple reason why.
Climbing the ladder in ranked, is as easy as winning 51% of your games.
It's not any more or less difficult than that. Teammates sometimes throw reguardless of the champion they play. Picking on people who are playing new champs, Such as some certain attitudes I received yesterday for playing Gnar in norms even, Aren't something people should be reinforcing.
If I look at your match history man, I highly doubt that over 50% of your games have been thrown by a certain champion or role to some grievous extent.
P.S. And also as someone else mentioned. The 7800 IP Increase is something that is in part helping to resolve a large number of players playing champions they are inexperienced with.