“Captain America: Civil War” is barely about the Sokovia Accords, its more “What To Do About Bucky?”. “Marvel Comics Civil War” is definitely about the Registration Act. The only thing that really carries over from the comics is the team ups.
I think it’s funny when people complain about the Bucky plot, because that IS the plot of the movie. The Accords are an inciting incident that are barely mentioned after Act 1.