I think Eurogamer gets undeserved hate simply because they don't sugar-coat their assessments.
If a PS4/Xbone game is just a PS3/360 game with a shinier coat of paint, they say so.
If a Wii U game underperforms technically, they say so.
They don't worry about hurting the feelings of overly zealous fans of any creed. Which inevitably means they get a lot of hate by bearers of the flags of all three companies.