1. Coming out. I suspect that gay people always existed, but just didn’t come out.
2. Interracial relationships. Far less common in the past. And society doesn’t view them as negatively now, which changes the power balance.
3. Parental affairs. I suspect this is the one that always happened, but people just lived with it more.
From my anecdotal list the problems are actually new. And except for the third, likely to get better.
Did you mean they aren't actually new?
It's hard to make this question grounded in data, but here's an anecdote I do think is accurate.
My grandfather was a horrific man. He died of complications due to alcoholism before I was born. That said, I've heard a lot about just what he was like, including from people outside the family. I've also seen 16mm film footage of him at family holidays, and it's shockingly clear every single other person in the room is straight up terrified of his potential temper. I'm not exaggerating on this point. I think he must have had something going very, very, wrong inside that skull.
My grandmother, who otherwise was a fiercely independent woman, stayed with him despite the abuse. My Dad, hitchhiked to Mexico one summer to escape him, but otherwise still tried to be the good son.
Why? Why not just divorce/disown the asshole?
The norms against that half a century ago were so much stronger. I do think that's an important shift that's happened recently. There's still plenty of people that stay in a bad situation due to loyalty, but the stigma, in the sense of victim blaming, has definitely eroded within my lifetime.
This is a very good thing in my book, even if it looks like a decay of society to some idiots.
In 1900, a husband beating his wife wasn't even illegal in most of the world. [1] Beating children and other animals would barely even register as unusual.
[1] It wasn't practically illegal in most of the US, both on the state & federal level until the late 20th century - https://www.cji.edu/wp-content/uploads/2019/04/domestic_abus...
But I think it's worth questioning whether the supposition is true or not, and not in the sense of "can I think of any examples of a dysfunctional family being exposed now that would not have been back then?" because when you're talking about a large population you can find examples of pretty much anything (including that a lot of dysfunction that would not have been tolerated in the past is now flying under the radar).
Rather the right question (according to me) is: what are the broad trends of what is actually happening to hundreds of millions of people and what are some of the factors driving the trends?