hehehe... connecting to a shared network and complaining about seeing other devices...
the only solution is to get your own private network (as trying to "exorcise" others out of the shared network might have you kicked out of the place)
new router, a lawyer, or a new place... which one can you afford?.......the choice is yours....
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"
Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"