The difference between MGTOW and incels is choice - MGTOW choose to be alone, incels don't. MGTOW reject female validation, incels pursue it (with entitlement). But they both say nasty things about women - "evil", "inferior", "worthless", and in the case of incels, "femoids" and "foids".
Also, according to TFM, his promiscuous single mother would feed him and his siblings expired food before abandoning him when he was 13, was manipulated by his grandma, was hated by his stepmother, was falsely accused of rape, and was cheated on by all of his girlfriends. So yeah, the question "Who hurt you?" is valid in his case.