Give people benefit of the doubt, perhaps they have been thru a lot in life or physically discovered things that have no explanation. A girl that's extremely gorgeous and has all the qualities any guy wud want in a life and close to 37 rishta's rejected her her Imaan was still strong and she discovered a strange piece of paper hidden inside a book with a map drawn on it plus a couple of ayat's and a couple of names. She was taken to the Imam of Makkah and he recited a couple of ayats over zamzam and gave it to her. She recieved a proposal the next month and is now happily married.
I do blv that people shudn't blame every misfortune or problem on black magic, and u shud say Alhamdulilah in every circumstance. However if one is afflicted they're afflicted and shud seek proper guidance.