RPi and obsolescence

 Attempts to get my system up and running have failed, so far.

The software has changed with each update, from Jessie to Buster to Stretch to Bullseye to Bookworm. The Exar driver has always been difficult to install, but now the driver will not compile.

I have two options. Wait till someone solves the problem or revert to an earlier version of the opsys, namely, Stretch or Buster.