WHY IS RENGAR SO WEAK

????

Because you suck at rengar? Sorry, but...really?

Because you are bad, not flame, it's the truth.

He's doing pretty well top https://lolalytics.com/ranked/worldwide/platinum/plus/tierlist/

are you taking predator on him? if so are you pairing it with ingenious hunter for the 40% cdr for it and ghost blade?

try rengar with Predator/sudden impact/eyeball collection/ingenious hunter/ultimate hat/celerity and after your jg item rush or and after words you can go for a more bruiser-esk build with a or if your ahead or they have a squishy comp opt out for an and then build either or with these two builds you'll always do damage even if you fall behind and the runes all secronize to not only make your ult stronger but to have it available more often and even without the ult ingenious hunter reduces the cd of your predator and so that you can make more plays (also more ms means more damage from celerity) and it also reduces the cd of your trinket so you can either ward more to help out your team with vision or so that you can use the oracles to help perform cleaner assassinations.[vlad-salute]