When it comes to BvS, the overall design was great, the cinematography was very good. The actors did very well, mostly. The special effects were above par. The film had a lot on it's shoulders, and it put forth a strong effort, all things considered. The Razzies should be for the misguided movies that don't try. The epically bad. The low budget horror movie remakes. The stuff that's so bad, you almost get glee out of critiquing it. Soap operas, for example. Like, "Congratulations... you get the "worst contrived villain award, hooray!" or the "worst conceived sequel award."
In this case, it feels like piling on for no reason. BvS suffered from several problems,.but it wasn't the worst comic book movie by far, and it wasn't the worst movie of last year either. It didn't fail because it tried too little, it failed (arguably) because the character and script choices didn't work for viewers.