With the meta being so focused on bot lane and 
i have not been in a single game with 
and considering at one point he was one of the most played junglers what happened? besides the nerfs Id think he was perfect for this meta...
Metas change, he got some pretty hard nerfs and he doesn't really have the same impact.
Right now a lot of LCS Junglers are choosing Tanks with engage e.g. Sejuani, Gragas, J4, etc.
It just makes more golduse sense to waste the support's gold on ardent censer for the ADC, so jungler tanks can use their gold on tanky stats to provide a frontline for their adc.
Ivern is boring that's why. You set your passive up on camps, then you are just skinnier Morgana with your snare and shield with a shitty Tibbers and a mechanic to build bushes that tends to help the enemy team more than it helps yours.
Well let's see.
Passive: Useless late game when you allies kill the camp before you can even finish casting, let alone allowing the grove to complete. Huge costs to use in terms of time and health/mana. Could really use shorter cast and finish times at later levels. Q: A slow single target snare with high cd that's only good when your allies are strong enough to all in on the enemy. W: Very little direct power in the active. The passive is pretty much only there to help you kill drake/baron/towers. E: Low base stats that require a large amount of AP to shine, however the scaling is offset by... R: Slow. Clunky. Dies with Ivern. Non-existant scaling. No longer heals when out of combat. Can't be healed by Redemption. At best she soaks tower shots, at worst she's a walking health pot for the enemy adc. Possibly one of the least impactful ults in the game. By far his least useful skill. Even his W would make for a better ult. Annie pities you.
So yea. Basically he's been removed from the game because his kit numbers are awful. His ult is now pretty much trash to boot. The only reason he was good was because of his E shield.
Well, he was strong. Then he got nerfed. Now only his dedicated player base uses him.
