The poll does not claim to represent every single player. What it does show is that among those motivated enough to engage, frustration is overwhelming compared to enjoyment. That is valuable feedback in itself, because engaged players are the ones who sustain guilds, organize events, and keep communities active.
Hence the bias. The desire to complain far out-weighs the desire to compliment.
You know how everyone is lamenting the downfall of New World? How there was a spate of posts here recently praising it and and how ZOS should learn from what NW did? Go to the NW forums, before the announcement they were moving to maintenance mode, and you'll see a litany of the same complaints you see here, in the same sort of numbers.