I am surprised to hear there is no mention of children who just don't like what their parents have become. My mother did a good job raising me, even if it was very heavy on the "I am your mother not your friend" philosophy and tough love. But in general, it was a lot about hard work, taking education seriously, being reliable and self reliant, etc.
Yet I see none of these things in her today. Every time I call its a pity party about all the wrongdoings done to her either by people or life. I know at some point I am going to have to support her, despite working most of her life and getting a sizable divorce settlement, I am not sure she has any significant nest egg saved. Quite frankly her brain seems to be rotting as she has few friends, hobbies or outlets in general and spends most of her energy getting involved in the near constant squabbles my extended family likes to get themselves into with each other.
On a more generic level though, I read a lot on the internet (well reddit really) about parents falling into Qanon, or even just being slightly cultist Trumpers, or crazy religious, and they just can't deal with them or identify with them at all. Then there is also the resentment of them being out of touch and being critical that they can't buy a house at 23, are having trouble finding a job, or aren't married and having kids, etc... completely oblivious to how much harder it is to do the things they did at their age today.
I do the minimum to keep in touch and literally have to mentally prepare myself each time I call or visit, because I just find the conversation immensely unpleasant. Its not "toxic" but the constant negativity is very draining. Maybe I am just an outlier here, but with 48% of the nation or whatever it is going out and voting red, and it appears that the younger generation having mostly opposing views, the disconnect might be more that they are just avoiding their parents- actively "losing" touch, rather than merely misplacing it.