In certain comic runs, Loki's character has been shown to have LGBT identities or relationships. This adds depth and diversity to the character's portrayal.
Yes, it's getting better. Marvel Comics has been making efforts to include diverse LGBT characters and storylines, showing more acceptance and visibility.
Well, there are also themes related to community. In dc comics lgbt fan fiction, the LGBT characters often find strength in their own community. They support each other and face the challenges together. Also, the theme of breaking stereotypes is quite common. Fan fictions may show LGBT characters defying the common misconceptions about their community. For instance, a gay superhero can be just as strong and heroic as any straight one, and sometimes even more so as they have to overcome additional obstacles related to their identity.