What steps should a sister take if her sibling is struggling to find a suitable spouse due to relatives preventing good proposals from coming through?
She should keep on trying her best to find a suitable spouse avoiding those relatives who try to prevent suitable proposals. No success can be achieved with out the Allah's Help, so we always need to seek His Help and Blessings, with Waseela of His most humble servants; Mohammad and his Holy Progeny.
Wassalam.