I don't think you're providing enough background information on the things you are saying, and as such, trying to spin what has occured in a different direction. From the beginning Sergey has been pretending the War Z was made before Day Z, promoting his game by disparaging Day Z continually. Even going so far as to create multiple sockpuppet accounts on the Day Z forum to promote it. The fact that it was so mind-numbingly obvious that this game was not in development years before Day Z, and was simply a cheap mod of War INC hurried to market to captialize on Rocket's success, was also a large part of the negativity felt toward War Z.
As for Devin, the former War Z forum mod, that incident only occured recently. And was a very minor one at that, contrary to what you stated. It didn't "turn out" he was disgruntled, It was known he had been banned, and had his privileges taken away. Sergey, the PR dunce that he is, had embroiled himself in a public war with a youtuber who made a negative video on War Z. Devin specifically went to that youtubers blog page, to try and entice him to make a video on his obvious nonsense. That's where the post originated. The youtuber didn't fall for it, and most other people didn't fall for it either.
The game itself is exactly what you would expect from a mediocre CoD clone repurposed to be a "zombie survival MMO". With a 50 player cap it's hardly an MMO. And when you can buy food/water/medicine when ever you need it, it's hardly a survival game.