Day tackled toxic masculinity twenty years before there was even a word for it. He really doesn't get enough credit for that.
The word may not have existed back then, but the concept did. In the '70s, there was this whole big thing about "men's lib," the idea that men didn't have to be shackled to old ideas of being tough and hard and angry, but could embrace their gentler, more feminine side and be openly caring, emotional, and vulnerable. The exemplar for this new masculinity was Alan Alda as Hawkeye on
M*A*S*H, a character who started out as a glib womanizer but evolved into a deeply caring and sensitive and woman-respecting guy as Alda's personality shaped the character. You also had other empathetic, enlightened male leads like Hal Linden as
Barney Miller or Bill Bixby as David Banner on
The Incredible Hulk. This was the image of masculinity that shaped me as a preteen, that taught me that there was nothing unmanly about being gentle and sensitive, that tough guys and macho boors were a relic of a dying, backward worldview.
But then there was a weird reversal in the '80s, with a new surge of machismo-driven action heroes like Rambo or Chuck Norris, along with a surge of deeply misogynistic R-rated comedy, fantasy, and horror movies. Somehow, the idea of enlightened, sensitive manhood receded and the idea that men had to be tough, unfeeling, warlike, and dominating to women came back. I was disturbed by that trend at the time, but that mentality has somehow gotten far worse in the generation since.
EDIT: Either by coincidence or because my browser is spying on me, its article-recommendation feature just showed me an essay about the '70s "mens' lib" movement and how it went wrong:
https://www.vice.com/en_us/article/eve7zk/the-mens-liberation-movement-time-forgot Although it leaves out any mention of the sensitive-male TV role models I grew up with and paints the movement as a short-lived aberration, so I don't think it's the whole story.