Tolstoi was completely disenchanted with the doctrine of Baha'u'llah

"Although Bahá’í publications have long quoted the laudatory comments addressed by Tolstoi to Grinevskaia and Badalbekov (item 5), Tolstoi’s attitude toward Bahá’í beliefs fluctuated and at times was completely contradictory. Tolstoi’s earliest reactions until about 1904 tended to be favorable, but upon receiving Bahá’í books from some of his correspondents, Tolstoi found a few of the Bahá’í tenets to be at odds with his own cherished ideals. In his letter to Dreyfus, Tolstoi remarks that his reading has “made me completely disenchanted with the doctrine of Bahá’u’lláh” and that it “confirms ancient superstitions.” And to Nakhjavání (item 62, 1909.11.28) Tolstoi writes: “The more I become acquainted with the Bahá’í teaching, the less I appreciate it.” Yet little more than a month before, he had extolled the “pure and lofty teachings of the disciple of the Báb— Bahá’u’lláh’ in a letter to Zheltov (item 73), and in his letter to Velikova (item 72) earlier in 1909, he had mentioned that the Bahá’í teachings worked toward the goal of eliminating the incrustations and superstitions added to Islam. The contradiction in Tolstoi’s attitudes may have arisen from his inability to distinguish clearly between the Bábí Faith and the Bahá’í Revelation, as evidenced by his usage of Bábí and Bahá’í interchangeably."

https://bahai-library.com/pdf/c/collins_jasion_lev_tolstoy.pdf