Okay, this is my opinion on the matter and then I'm out.
Was the movie as terrible as critics say? Not in my opinion. It was a pretty huge mess, but I was entertained and walked out feeling like I got my moneys worth.
Is it better than Iron Man 2 & 3, Thor and Thor: The Dark World, and Age of Ultron? You damn right it was.
Were critics paid off by Disney? I don't think so. However, there have been confirmed reports of groups being bought out by studios (See:
FOX paying off the AMPAS to get a Best Picture nomination at the 1968 Oscars.) Also, Max Landis brought up earlier this year on Twitter, that he had heard of critics being bought off by studios. He later recanted and deleted the tweet. The possibility is out there, but I don't really think that's the case in this matter.
Were critics biased toward Marvel? Some probably are with Faraci being the prime, shining example. I know a lot of the internet ones such as Screen Junkies, Double Toasted, and comicbookcast2 definitely are. I think a lot of people were ready to shyt on the movie from the moment that it was announced and would find any and every way possible to find a complaint that they may let go with other movies. A lot of critics just didn't like it. Fair enough.
Did Warner do anything to hurt themselves? Yes. They pretty much gave away everything away with that one trailer featuring Doomsday that was released last year.
Should Rotten Tomatoes be the word on whether a movie is good or bad? No, you should make up your own mind on whether a movie is good or not without Peter Travers or the Schmoes Knows telling you otherwise, but for this movie, in particular, the media really hammered home that critics hated it. It almost became the top story out of all of this. If you talk to a random person on the street about BvS, I'll bet over 75% will say "I heard the critics trashed it."
Is the Marvel/DC rivalry annoying as all fukk? YES!!! It's tiresome. But it's going to continue, and I'll probably end up ignoring a lot of posters so fukk it I suppose.