Okay. Iron Man 3 still goes to prove that Tony Stark is Iron Man (and not just his suits). There aren't any overarching connections to the MCU, outside of Rhodey, though.
If you don't like Superman, even as a concept, then I guess Worlds of DC isn't for you. He's one of their primary icons and shaped the entire DC universe. The events of BvS, Justice League, etc. Wonder Woman is a good standalone flick. So is Aquaman.
Yes, Suicide Squad as a concept is good, but the movie is an easy 'F' in every sense of the word "failure".