Shi'i Islam had lost once for all

Shí’ih Islám had lost once for all, in Bahá’u’lláh’s native land and as the direct consequence of its implacable hostility to His Faith, its combative power, had forfeited its rights and privileges, had been degraded and demoralized, and was being condemned to hopeless obscurity and ultimate extinction.

- Shoghi Effendi

http://reference.bahai.org/en/t/se/WOB/wob-48.html

“O people of the Qur’án,” Bahá’u’lláh, addressing the combined forces of Sunní and Shí’ih Islám, significantly affirms, “Verily, the Prophet of God, Muḥammad, sheddeth tears at the sight of your cruelty. Ye have assuredly followed your evil and corrupt desires, and turned away your face from the light of guidance. Erelong will ye witness the result of your deeds; for the Lord, My God, lieth in wait and is watchful of your behavior… O concourse of Muslim divines! By your deeds the exalted station of the people hath been abased, the standard of Islám hath been reversed, and its mighty throne hath fallen.”

- Baha'u'llah

http://reference.bahai.org/en/t/se/WOB/wob-48.html

See also "Collapse of Islam" at the same link.