Shakespeare's portrayal of marriage is pretty bleak in Othello. The play begins with a conflict between Desdemona's husband and her father, who sees his daughter's elopement as a kind of theft of his personal property. The play's two wives (Desdemona and Emilia) are both unfairly accused of infidelity, and both wives are murdered by their abusive husbands. More famously, perhaps, is the way Shakespeare examines sixteenth-century anxieties about interracial couplings – in Othello, the marriage of a black man and a white woman allows Shakespeare to explore attitudes about race and gender.
In Othello, marriage is tantamount to death.
Othello suggests that, as long as men view women as being promiscuous and disloyal, the institution of marriage is doomed.