I did watch MoS with an open mind...in fact, when I walked out of the theater I thought I liked it.
But my issue with the last two DC movies is they are so overly serious. When a movie is overly serious the plot holes and silly things get much worse for me, unlike say the Avengers or any of the Marvel films, which have gaping plot holes (again, why did Loki let himself get captured? ) but they are all so tongue in cheek, who cares.
The more I thought about that movie, the more I didn't like it.
Plus that end fight scene went on way too long, and you know, only killed 10's of thousands of people that Superman didn't really bother saving...well, until that one family, when he went all neck breaky.