In the two-month battle over the fate of Harvard’s president, the billionaire investor William A. Ackman has cast himself as a protector of Jewish students and the standard-bearer for people who believe colleges have fostered a hostile atmosphere for critics of liberal orthodoxy.

But behind his anger are personal grievances that predate the uproar that has engulfed campuses since the Oct. 7 attack by Hamas on Israel and Israel’s subsequent invasion of Gaza. Mr. Ackman, by his own admission and according to others around him, resents that officials at his alma mater, to which he’s donated tens of millions of dollars, and its president, Claudine Gay, have not heeded his advice on a variety of topics.

Most recently, this includes how to respond to complaints of antisemitism and the specter of violence against supporters of Israel on campus.

“It would have been smart for her to listen, or to at least pick up the phone,” Mr. Ackman said in an interview, describing a recent outreach to Dr. Gay that was part of a stream of calls, texts and letters to university officials.