It's an OK plot, but there's nothing added to it. Characters are delineated by their names (if we ever get them) and nothing else. Conversations play like rough drafts that never got rewritten. It's like the writers watched Soderbergh's Schizopolis but didn't get the joke . The movie's attempts at comedy are mostly just set-ups with halfhearted shrugs as punchlines. Even the fan service is lazy: It's as if the director said, "We need to do the Bubo thing. Sam, get the robot owl out of the prop chest. OK, wave it around. OK, drop it back in the box. Great, cut, print!"
Sometimes directing looks like waiting for a check to clear
Louis Leterrier (The Transporter, The Incredible Hulk) was hired because he's supposed to know how to do action. But in Titans, scenes just sort of happen, with no buildup or sense of progression. When fights do break out, they're shot incoherently. The CGI that replaces Ray Harryhausen's charming stop-motion is adequate, but the 3D effects applied in post-production are so shoddy, I'd actually recommend trading blurriness for the flickering and shimmering you'll get with your glasses on.
"Watch out for that cliche! It's huge!"