I believe you are talking about the Sergei in the “What, of This
Goldfish, Would You Wish?” If that's so, then the theme about happiness presented here is that people hold onto different things for their happiness. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.
the answer is snubbed because slighted means to be rude or disrespectful and snubbed is to ignore someone and in most peoples opinions ignoring someone is disrespectful so I feel like that would be the answer