Do the phrases: (It's over/Divorce), (There's nothing left), (If you're afraid for me, leave me), (I'm trying/experimenting), count as a كناية (allusion/euphemism) for divorce if uttered by the husband? And is a كناية of divorce taken into consideration if it was not addressed to the wife?

"Kinayah" (allusive divorce) is an utterance that can signify divorce or something else, and divorce does not occur by it unless intended. As for utterances that cannot signify divorce, divorce does not occur by them, even if the husband intends it. There is no difference whether the wife is directly addressed with the utterance or not. Divorce-pronouncements do not effect a divorce if they are not attributed to the wife. The words " خلاص" (khalas - enough/finished) and "مفيش أي حاجة" (mafish ay haga - there's nothing/there isn't anything) may be among the kinayat of divorce, because the first might mean liberation from the marital bond, and the second might imply the negation of any remaining marital bond. However, the rest of the words mentioned do not carry the meaning of divorce, and the question appears to stem from waswas (obsessive whispering/doubts).