i look into his kit, it's a 
kit but with high mana cost, situational mobility/cc, terrible early game ganks, and extremely low tankiness compared to them.
Because he can hunt people? they can know whenever he is here from a great distance, 
is better at doing it.
Because he has his ulti? one cc or 
and it's gone i prefer 
ulti.
Warwick isn't weak we can see it with his win rate from op.gg he has 52% win rate
i just can't see when you have to pick him.
JafarThePanda3 votesWarwick is good against: People who cannot kite easily (typical of tanks) Weak early game champs who need to farm Limited mobility champs (most of your mid laners and some toppers)
Warwick needs: A team with good CC and teamfighting capability To snowball early To avoid getting caught while in ult
Warwick's weaknesses:
Kiting from hyper mobile champs 
Other tanks 
to name a couple
CC 
My typical WW build goes as follows:
sucks never build it
is too expensive but a really good item when ahead
vs crit
in very heavy AD matchups (I'm talking full AD, no AP)
if you're super ahead (Which means you won already)
Fervor works wonders with your kit but ultra tankiness can be done with strength of ages, but you lose crucial early damage for it.
I take 25% attack speed total in runes, armor, and scaling magic resist, 
style
Rabblerouser2 votesWhen you have low ping and need a braindead-simple point-and-click jungler? Skarner kinda-sorta fills that void, though? Also he's a good jungler to learn the game on.
At any rate, he's being reworked and I hope they rework that useless self-destructive hunt into something that's actually usefull. Maybe give him more CC and see him as more of a support? Of course this is my support main side speaking. Riot will go for the "fantasy" of Warwick and keep the things that make people like him mostly intact, which.... is likely his sustain (which, thinking on it, is PROBABLY WHY he might not be as tanky) and his suppression. I do like attack speed steroids but it feels so weak on Warwick.
The Minion hunt1 votesww is a weird champ but imo he is a tank, that hunt thing just allows u to stick to a target in team fights (as long as 1 enemy is lowish health u move faster), he is a tank with high sustain, without building tank ww just get bursted. His ult is used for lock down/ gap close imo. No joke a tank ww has some decent damage with 1 attack speed item, can be hard to kite(sorta), and u will notice his sustain more when u build him tank.
I see people build him like 2 damage items outta the jungle, then 1 tank item mid game, not good imo, your ult is a lockdown for the lane you are ganking for, doesn't need to do damage. My core build on ww (out of top lane) is sunfire(vs ad), spirit visage(vs ap), botrk second item followed by sunfire or visage. works for me but im only silver.
on hit ww is a waste imo.
Ahristocats1 votesSo what you mean, is that ww is a better since people used to build aatrox tank, but now with all his nerfs tank aatrox doesn't do damage anymore.
you still didn't say when i should pick him instead of the current junglers.
The Minion hunt3 votesyes. and I wouldn't jungle him, rely on his ult to much for good ganks, play volibear.
Incognonymous1 votesLevel 5 WW mastery here. Typically I hold off on picking unless my team has plenty of CC without my contribution. Especially on slows. Nothing feels worse than trying to play WW on a team that has no soft CC, especially if the enemy team has lots of mobility or disengage.
The junglers job isn't necessarily ganking, it's objective control. In that respect, WW is actually okay. He has enough sustain and damage to take early dragons, and his AS boost makes turret taking easy too. Ganks without ult take CC from laners, which can be hard to coordinate.
It's funny you say he has low tankiness though. I typically play whatever jungle on hit item is available + Wit's End followed by full tank. Never had a problem with it.
Ahristocats1 votesthank you for your reply, just wanted to say that what i'm saying is that ww has less innert tankiness unlike 
because of his base stats and his spells not giving him tankiness unlike skarner's W for example.
Sahn Uzal1 votesQ: When should you pick Warwick? A :When his rework hits live. (His rework is in early proces, for those who don;t know)
TheOvermind1 votesWhenever qss is disabled due to a bug (never)
The Minion hunt1 votesthat's like saying malz is useless cuz his ult can be qss'd. if worst comes to worse u can always use it to peel for apc/adc.
KONO RUBICK DA1 votesmalz can kill the entire team because of his kit, warwick get kited if his ulti is down, and his E is only activated if someone is below 50% hp.
The Minion hunt1 votesif your a tank ww and your getting kyted good for you, someone is peeling or getting zoned. and when the hell does a team fight happen when no enemy hits 50% (if so just gg and render). now I will go out and say unless catching a carry out of position his ult is not an engage.
XxxLumberJackxxX1 votesI only pick warwick when- I'm jungling I'm near to last pick The enemy team has 2 or more assasins and minimal CC.
These conditions aren't met too often, but when they are I'm 65%