Reb Eliezer,
“Unorthodox “ in the title of his book was not referring to to the “orthodox “denomination of Judaism, it’s a description of himself and his journal. You’re taking it out of context. He never associated with anything other than authentic Yiddishkeit.
Of course he was Mikareiv many, many Yidden who had may have drifted in different directions before they had had the fortune of meeting Rabbi Feldman.
No Mesora,
Your statement is ignorant and wrong. “Great Rabbanim “ did not violate Halacha