So Much Rengar Hate...
There is SO much Rengar hate on the Boards that seemed to have only cropped up in the last 2 days, during which nothing has happened.
On one hand, I can understand the hatred with the gutting of vision. No good anti-stealth available (Red Trinket doesn't actually let you target them, iirc, just see them) that doesn't get knocked down immediately, lack of Stealth Wards available creates lack of map vision (new warding trinket is a joke), and the changes to the Mastery Tree has given him some MAJOR hybrid burst damage (That scales with AD on a 20s CD, btw) in the form of Thunderlord's Decree.
On the OTHER hand, I don't agree with most of the hatred. Yes, he's not very fun to play against. But since WHEN have assassins created a healthy laning experience that made you say "Wow, that was an intense lane, really back-and-forward in terms of winning lane", doubling down on this if they're junglers (Remember Season 4 Kha'Zix with Elder Lizard, one of the best junglers available that wasn't Lee Sin?)?
Assassins as a classification are squishy playmakers, dishing out tons of damage to priority targets (the ADC, another Assassin, the Lee Sin, etc) and usually dying for it. Note that important phrase: "...And usually dying for it." Rengar usually DIES when he R-jumps in and kills his target in a realistic scenario. If you fed him hard, then he'll just 1v3 your team with Empowered Q and you die a little bit inside as you watch your Zed, Lee Sin, and Caitlyn turn into molten piles of ectoplasm while Rengar walks away laughing with the 2.5k+ gold he just made.
tl;dr: I think the hate towards Rengar isn't undeserved by any means, but misdirected. People should be complaining about the hyper-safe Assassins like Zed, Lee Sin (He can go full tank and still 1-shot your ADC...), and even Katarina to a lesser extent (though she's pretty balanced out by a reliance on her passive, so she can get a pass), and the complete lack of meaningful Mastery choices (You take Thunderlord's on everyone that isn't a tank, Soraka, Nami, and Sona, and Warlord's Bloodlust on Tryndamere and Yasuo).
But hey, what do I know? I'm just a Silver 5 support/fill main that's tried every champion at least once or twice and loves playing off-meta junglers. I'll just sit here and be the ward-whore for the team.