Why is Ivern such a terrible champion?
I know they have some changes on the PBE for him, but they aren't significant changes that are going to affect him. They're too small and way too late.
Now, before you go and post "Ivern is not a bad champion!" Let's be reasonable here. This champ has the lowest win rate in ranked play in the game clocking in at 40%.
Source: http://na.op.gg/statistics/champion/
And his win rate is terrible based on number of games played too, so don't go arguing that he's hard to master, but once you master him, he's good because that's not true either.
Source: http://champion.gg/champion/Ivern
He Is A Bad Champion
There is a spike in win rate for the 5-15 games played with him that quickly falls off, but the spike is probably due to all the ELO you're losing by playing him, so you get matched with weaker opponents.
does look and appear pretty useless though. I think his win rate will climb as people figure out how to play him, but he appears to be more of a "support jungler" but people are still building damage on him and no tank. I think people are just building poorly for his kit. In another month I bet you his win rate will be about 45%