It reminds me a bit of Mary Harrington's essay this week, where she says that feminism became undermined because it embraced liberal individualism rather than the kind of social understanding that underpinned the earlier women's movement and leftist social movements. And, I'd add, also traditional conservatism.
Once you see that progressives are actually liberals, (and I don't mean fans of liberal democracy but rather fairly radical individualists,) which is an ideology that is not all that compatible with the left or conservatism, it shatters political tribalism under the current model.
There has been almost no real political representation for old style leftists or conservatives for about 40 years, and people became used to that. But it's no longer possible to avoid seeing it for many. And at this particular moment, most of the "left" parties seem to be moving farther and farther into toxic identity politics which are fundamentally apologetics for global capitalism, while many of the conservative parties are looking at traditionally leftist things like movement of labour, protection of industry and workers, and even pro-union legislation.
So - no wonder people who saw themselves as being on the left, once their eyes are opened to what is going on, are rethinking.