You made it farther than me... I've only been able to watch that movie one or two scenes at a time... never all the way through at one sitting. I think I've basically seen the entire movie at this point, or at least... I've got the gist... No interest in trying to watch the whole thing in one sitting. As an aside, I didn't like the conclusion/climax of the movie at all... it was generally too absurd... even for a superhero movie, not to mention the whole premise of it was awkward and off-putting.
Putting aside the mediocrity of the movie... Wolverine is much more interesting as a character with his backstory being shrouded in mystery. It's one of the most compelling things about him... how tortured and enigmatic he is. All the backstory they've explicitly shown us just kinda spoils it. The best way to show Wolverine's backstory is through cameos, flashbacks and passing references/innuendo... putting the audience in a similar headspace to where Wolverine is... only partially/vaguely aware of his background with lots of empty spaces and unanswered questions.