Deep down, as much as I have watched Marvel and DC movies unbiased, Marvel deep down is scared of competition being developed and forced to step their game wayyyyy up. BvS is the second film of the DCEU, and they (the bribed critics) are doing anything they can to prevent a legit Superhero universe from challenging Marvel in quality. The Marvel films, for so long, had no competition and their quality goes from
to
, and it's not consistent. The reason why I used to support them blindly is because, for so long, comic book films were considered a joke back in the 90s.
Now, in the eve of Captain America: CW, the third and final Cap film of the series, Marvel knows that they have to deliver on that level or higher from now on. They know with Suicide Squad, Wonder Woman, The Batman, and so on in the horizon, a half assed effort can't be protected, not even from the fanboys and critics. Look what happened to Marvel when DC came in the animated DVD game and quality came in....
Marvel is scared of that situation happening to their bread and butter called the MCU that brings in hundreds of millions of dollars per year. Only time will tell that DC will come in and start to deliver quality like their animated DVDs.