Batman V Superman: 10 Reasons We're Worried For Justice League
7. Warner Bros Clearly Has No Confidence In The DCEU

It's no secret that, while Warner Bros. are ambitiously pressing on with the DCEU, they are absolutely aware of the litany of issues plaguing the venture, and are clearly concerned about hitting the markers they need to in order to replicate the MCU's level of success.
It was reported in the months before Batman v Superman's release that the studio were worried about how the movie would be received, and now that the end-product is out in the wild, it's pretty clear why. This likely goes a way to explain why Warner Bros. insisted upon spoiling so many of the movie's big beats in marketing, as they were just desperate to get butts in seats (a strategy that appears to have mostly paid off).
Aside from the obvious question (why greenlight a messy script they had no confidence in?), it's just not very re-assuring if even the studio bankrolling the movie isn't massively optimistic about it. Such is the problem with wanting to play catch-up with Marvel no matter what: quality is inevitably going to take a backseat to pretty but hollow, marketable images.