That trailer has more emotional growth and a clearer character arc for Clark than the actual film. The film spent more time trying to be a sci-fi epic than a character piece, and Clark's formative years and relationship with his dad was watered down by being shown spread over multiple flashbacks. I was downright incredulous at the infamous tornado death scene, which was nonsensical on so many levels.
I'm sure with some brutal editing, a MoS that was in line with the trailer could be salvaged from the wreck of the cinematic release. There would still be a bunch of issue inherent to the screenplay, but a different director could have made a better film from the source material.
Incidentally, the one part of MoS that sticks in my craw the most is a single line of dialogue, which shows that the Goyer and Synder DNGAF about producing a coherent story. After Faora's fight with the the army, her pithy victory line of "as you know, evolution always wins" is entirely opposed to the plot of the film and what her character is fighting for. Zod wants to rebuild Kryptonian society that explicitly did away with evolution. But I guess the line sounds cool, so Zack "style over substance" Synder kept it in.