Ow. That seems a bit much. But eh, it seems a lot of people hate this vision of Joker, and have ever since the initial shots of him came out. It's still possible he won't be bad.
It's hard to tell anything about story from any of it. And they probably just skipped everyone's actual origin story just to go straight to the action (which might be an extreme over-reaction to people being sick of a superhero's origin story being shown every time a new version of them is put on screen). Really, though, the only thing that I disliked - mind you, not saying I think the rest is great, it just hasn't put me off yet - is Will Smith being too blatantly Will Smith. But then, I also saw a trailer for a new movie coming out that seems interesting but stars Tom Hanks and I couldn't see him as anything but Tom Hanks.
The rest, I'll give a chance. Not putting my expectations of it up there with SvB or especially Deadpool, but I'll at least give it a fair shake.