Is it NSFW? There's no gore, no nudity, and no swearing. The title and community already state it's not exactly feel good but I don't see anything that you wouldn't see in any Marvel movie.
Some servers (including the one I'm on just now) don't show anything tagged as NSFW, as an easy means of complying with stupid internet laws. Using the NSFW tag as a catch all term for anything you may not want to see then censors large amounts of content.