Not illicit drug use, but prescription anxiety medications. He attempts to tell himself he will quit, lies to his wife about his use and keeps bottles hidden.
A documentary on ants describe the execution of a queen ant by the worker ants. It shows the queen decapitated. Not everyone considers insects an animal, but just in case
Robert chooses his family over his own self-preservation. He’s warned by several people, including his own intuition, that there is danger and to leave. He confronts the Visitor and one again chooses family, allowing his persona to be absorbed by the visitor.
Possibly. Mr. Braun made a statement about his attraction to the visitor when sharing what led him to collecting the photos/prints. While that doesn’t make someone LGBTQ+, it’s a possibility.