You have to type in the brackets yourself since we don't have a spoiler button for some reason (other proboards do...), but you just type a set of brackets   and in the first one you type "spoiler" and in the second, you type "/spoiler" (no quotes on either), and then type whatever you want to hide in-between the brackets.
Yeah, I agree about the second challenge. It felt like the movie was really trying to force it to advance the story.
And it's true about the CGI, which is surprising considering it had a bigger budget than, say, Thor: Ragnarok or Guardians Vol2 (which were incredibly visually pleasing) or Civil War, which had an insane cast to pay. I wonder if some parts were rushed?
The costumes and design more than made up for it to me, though.