I dont think you understand, Yeshivas are usually ‘Family Businesses” and whomever was in charge 30 years ago, its likely in charge today or at the worst their decendents are . So they same people are in charge, even if the Perp is no longer there.
If it can be proven that he enabled, he should be fired. Legally, no yeshiva is privately owned, or they couldn’t receive tax deductible donations. There’s a board, who can hire a new dean.
I don’t know why you think descendants should be liable for the misdeeds of their parents/grandparents. I think that’s very wrong.
And I am fairly certain you cannot leagally sue the Perp if the crime happend during work hours. The employer is responsible
So change the law. Suing a yeshiva out of existence isn’t the answer. The people who will suffer aren’t the perpetrators or enablers.