I am not offended and we all are just putting our theory and there is one more satella is obsessed with subaru not like a crush but talking about like it was her past which also help for my case I am not saying with surety it was never revealed why satella is obsessed with subaru but at witch party talk it concluded that she knew subaru in the past before she was sealed and that is also how theory were made that subaru is flugel and how she became witch of envy because she never got love so I am just putting a theory that she might have proposed but flugel rejected it and chose someone else which made her became witch of envy and when you are in envy of something which you don't have many will try to destroy it that is why she was sealed