One of the times I was most frustrated with the film was right after Superman arrived at the final battle. We got like 30 seconds of awesome fighting. Then all of a sudden they're like "Oh no - people are in danger!" and then Superman STOPS FIGHTING AND LEAVES. We were finally, after almost 2 hours, getting to see what we wanted to see, and they cut it short.
Then when Supes comes back it's like he hits Steppenwolf twice and it's over.