Damnit this would’ve been my immediate response, too.

Pff, just define your own cascade with @layers :)

Best advice I can give: Don’t use CSS directly, use a pre-processor like SASS/SCSS. It really helps keeping things sane and somewhat organized.

How do you cope with all this without just giving up?

By making it personal.
No but seriously, in my country (Germoney) a terrible plan of the far-right fucknuggets got revealed and the people are taking it to the streets in response. During this week, I activated quite a number of co-workers to BE there this weekend. You can change people, you can change them with respect, words and your deeds. I’m a firm believer of “do good and talk about it”. The process is a bit grindy though, ngl ;)