He has an incredibly toxic kit.
He interacts extremely well with 
and just furthers his toxicity
One of his escapes is a DASH + CC
On top of that, he has invisibility and speed bust
If it wasn't enough, he does 25% true damage as an execute at level 6
So let's recap:
MrFawknSunshine4 votescorrect me if im wrong here but can he not effectively build hp?
ChaosReyn3 votesI've been saying similar: Kench, the proprietor of gray health, regens less than half of what Pyke does, and he has to put points into it.
They've been freaking out so much about how OP he is in teamplay while also freaking out about how bad he is outside of teamplay...how about...give some of Pyke's APESHIT regen to Kench, who invented it..?
hrooza dota 1 votesthe problem here is not really pyke
its kench, kench abilitys are weak thanks to his overpowered W (or whatever that eating ability button was) , if im not mistake they are trying to kill ally W to buff his other abilitys
Edge of Daybreak2 votesTahm also gets to actually build health so he has a lot more of it than pyke ever will. Oh he can consume it all to effectively double his hp.
xDogMeatx2 voteswhy did you call him puke? also true damage is his weakness aka chogath or darius mainly.
boricCentaur11 votesHe will never have his e up to escape and he only gets ms from his e meaning it is a very weak escape and same with ghostblade.
Like pyke has almost the same level as mobility as fucking leo in a fight. Like have you even seen a pyke?
hrooza dota 1 voteswill he have 2 escapes (w and E) and only one is really strong as an escape (E) , which is also his real engage tool (you kinda naming the same things in your recap like counting mobility and escapes as different things when they are pretty much the same thing)
all what you have to do is just not focus him and instant go at his adc , all his CC/displacement have delays and can be dodged out side of melee range slow
damage regen is strong but he also unable to pay hp at all (and no turning all your hp into AD of same value is not good, if pyke want AD he can build AD items 
)
share gold is the real reason to pick the champion over other hook champions tbh 
he is an aggressive champion around snowballing and without the gold he lack viability in later stages
Boltonator1 votesHE is called pYke, not puke.
Reaper Soraka1 votesI like playing Zyra against him.
grow a plant in front of his hook, just one so he has to slowly go around it. If he tries to hook around it: Then plant another when he's almost past with your other spell. if he backs off: passive again. you won trade with plant damage and he's on cooldown.
post level 6 he dashes in to engage: wwqerd or wweqrd > qwreewqrewrewqrewqrewrewrewq doesn't matter anymore. (D is the place for where you put every other spell whenever you're playing League~!)
Alternatively I don't mind playing Soraka, Leblanc or Nami against him but it's a little more difficult. Leblanc just kills him in one combo later even with trinket. Just sweep his wards away so he facechecks/gets close enough.
Shmeeve1 votesPuke is pretty toxic considering it's basically your lunch from six to seven hours ago... nasty stuff.
stay noided af1 votes"If it wasn't enough, he does 25% true damage as an execute at level 6"
This is demonstrably false, Pyke has a Flat damage execute(scaling with Level, Lethality, and AD), that ONLY does true damage if the target HP is below the Flat Damage amount. He deals no forms of %HP damage anywhere in his kit. What % HP he can execute at depends wholly on the HP of the target champion.
