Is there any example of physical spousal abuse anywhere in tanach or shas?
The mishna in Kesubos describes a series of psychological abuses, all of which are grounds for divorce (and Tosfos says actually, the rabbi should step in and recommend it). For instance, "I demand that you tell the neighbors some deeply-intimate details about yourself." It doesn't really spend time on physical abuse.
There are feminists who claim that physical abuse was so common the Mishna just ignored it; I think it's far more likely that there was no need to address it because it was unheard-of. Or at least obvious from the discussions of psychological abuse.