Exactly, people can just vote 10/10 or vote 0/10 just to lower the score. And with Angry Joes review, it didn't seem fair and didn't make sense overall. But I guess that's just his opinion, that's my opinion on his opinion and again your opinion. It's all about opinions.
Obviously he won't have the time to fully play ESO, he may rate it a 5/10 with the limited time he may have (whilst reviewing and playing many other games) but someone who plays only ESO may rate it an 9/10 if it's the only game they've been playing.