It is especially strange to me that DC movies does so poorly considering how strong their series and anime are compared to Marvel.

DC characters are empty and humorless. Their stories often making no sense whatsoever on top of being rushed.

Meanwhile, at Marvel, they took the time to develop their characters and let the public bound with them. We care about what happens to them. Marvel provided fun large public movies in a well implemented fashion that took the time it needed. 

Individually, the first two Batman movies are not bad movies at all. They are even better than most Marvel movies IMO. Same goes for WW to a lesser degree.

MoS was very flawed, true, but definitely not bad, nor botched. The heart was there, but they didn't use their head. They just made very bad decisions on key issues preventing a very promising movie to fulfill its potential.

DK rises was meh, and Suicide Squad just bad. However, what really hurt DC was their two last block busters: BvS and JLA.

Most important of all, they failed so bad at merging the movies into a coherent universe like Marvel did. 

What happened to the plot and character development we have in DC's animated universe? 

Don't get me wrong, DC does way better/cooler action scenes and fights. I'll give them that. But the cost the movie pays for this has too often been too high.

**Edit** I also wanted to add that, to be fair, DC always, so far, came with FAR better soundtracks. Poor consolation, but there it is. Just listen to the score of MoS, Batman and WW. It is pure awesomeness unique and memorable.

DC needs to go back to the basic and be ready to take its time and stop caring about what Marvel does. They have all they need to do superb movies. Less suits involvement, more artistic consideration.