And that data proves what about your point exactly?
Not a single shred of what you said in the OP is supported from those stats. None.
Point 1: Yeah, fine, if you think it's worth it, although statistically, you're better off banning someone like Talon or Ahri, who have either about the same (or higher!) win rates then Zed, while having higher pick rates.
Point 2: Not a single point of that is correct. At all. I don't even get how you make such a leap.
Point 3: I'll just put this again:
[{quoted}](name=Wilk Rycerz,realm=NA,application-id=3ErqAdtq,discussion-id=EWRw90A9,comment-id=00020000,timestamp=2019-06-19T02:27:40.060+0000)
They don't.
What he's referring to is when he makes a post on gameplay that has the total content of "worth it", and it is removed by Volunteer Moderator Staff, NOT Riot, for low effort with a warning (and that warning given as a fact that someone who has been on the boards as long as him should know better then to post something like that on Gameplay)
Point 4: Again, not even true in the slightest. Want the easiest way to counterplay him? How about the free to 600g item that completely shuts him down in lane (the most important time for an assassin)? Or how about how you know the exact location he's going to show up after his ult animation, giving ample room to CC him and stop him in his tracks.
Point 5: Any evidence for that? Any at all? Anything that can be even remotely taken as objective input, rather then subjective complaining?
Point 6: ONCE AGAIN: Not. True. At. All. He's a goddamn ASSASSIN. If he can't escape, what the hell is the reason for even picking him? Not to mention that it's incredibly tame vs every other single real assassin in the game (and even some assassin-esque champs!)
And finally, we get to the only actually true independent point that you have said in this entire post:
Yes, 6 points (however made up and wrong they are) is certainly enough to not be considered low effort.