Why Siddhanta Saraswati never appointed a successor Acharya after him-Swami A.C. Bhaktivedanta

My Guru Maharaja used to lament many times for this reason and he thought if one man at least had understood the principle of preaching then his mission would achieve success. In the latter days of my Guru Maharaja he was very disgusted. Actually, he left this world earlier, otherwise he would have continued to live for more years. Still he requested his disciples to form a strong Governing body for preaching the cult of Caitanya Mahaprabhu. He never recommended anyone to be acarya of the Gaudiya Math.