1) Done by a studio whom the fans had no contact with since 2007, with no other
projects done in the Elder Scrolls universe to show what they can provide for the franchise.
ESO was practically shoved in our faces basically saying "There, we're done with it whether you're happy or not"
This. If Zenimax Online had actually communicated with fans, even if it was just a little, I think the game would have been much better recieved. I mean, what's the worst that could happen? Another studio might bring out their own MMO to compete? What are the odds of
that happening?

You can't just do whatever the marketing department tells you and bring out a TES game that bears only a superficial resemblance to other games in the series and NOT expect a backlash.