Dear Avira,
Seriously? You think history is what some single individuals did or didn’t write? Rav Yechezkel Landau is at the beginning of the struggle for emancipation. Why should he write about the bitter past that he is struggling to leave behind? Yet there is still mentions of the terrible plight in some of his writings. But see the Maharil, Terumos Hadeshen, and others, for ShuT that arose from the daily atrocities.