“Every day, I come by your house and I pick you up.

[Tucker's Law]

Superman is...pretty damn terrible. 

It should be good. Actors are fine, scenario is fine, action is fine, CGI is passable. 

The script though...Jesus it's rough. Unnecessary exposition just constantly rammed into the audience's face, terrible dialogue, complete lack of transitions. Just scenes pasted together with little thought of how one moves to the next. 

The choice to go in media res and not really spend any time developing anyone's motivations or character. 

I'll give Gunn some credit for going full superhero comic book tone, but I hate comic books for a reason.

This DC reboot is off to a very rough start.

Potato is right, it was pretty fucking bad and almost entirely so because of shit writing and bad directing.  Cast are all pretty good fits for the characters, and if they get a writer and director for the sequel that actually likes and understands Superman as a character, then that sequel might actually be worth praising.  Standouts are Mr Terrific and Guy Gardner Lantern (dumb haircut and all, Fillion was a great fit at translating his comic dipshittery onto the screen, and is certainly a character much more in line with Gunn's creative strengths).

Snyder Supes movies were much better than this entry.