The SC judges are supposed to be non-partisan. The idea was that life terms would insulate them from partisan pressures. This has never really been the case. As far back as 1857, the Dred Scott decision was largely viewed as influenced by partisan politics. You can look to the tensions between Roosevelt and the court for more stark evidence of the political nature of the Supreme Court.
Changing this would require a constitutional amendment, which seems unlikely in the near future given the present state of affairs.
I’m happy I could help. My sympathies for having to make up later in life an education you were rightly owed. I’m from the south myself and know more than a few people who experienced the same. Fortunately it’s never to late to learn and what better time than an election year?
If you’re interested Scott Abernathy’s “American Government: Stories of a Nation” is a great and comprehensive overview of the structure and function of the US government. It provides a fairly balanced view and a narrative style that is easier to digest than more textbook-like sources.
Our country is indeed in trouble and while I won’t say fixing it will be easy, I urge you not to give in to doomerism. Stay informed, be critical, and most of all, find some way to get involved, if you can, at the local level.