I think the A-plots. Lois getting death-rowed in just 2 weeks. The Vixen? Luthor's body retaining enough integrity to heal after falling 500m of free-fall and not even a single scar. Space station Prometheus next to club-sized mobile phones. I could continue.
On the other hand, I'm willing to accept everything related to superpowers and time travel. No idea why. Maybe because superpowers are a part of the package. And time travel. Well, there's Star Trek. So, time travel is a scientific fact nowadays
Seriously, though, time travel is fun, so, no reason to complain.
Michael