I actually watched Severance and have seen bits and pieces of a couple of the others. The first season of Severance was okay, but I think it went off the rails in the second season. I probably won't keep watching when they drop the third season.

It had an interesting premise- what if you really could just blank out all the time you spend at work, but doing so meant you created an alter ego whose whole existence was doing your job (sounds like hell). There were a bunch of mysteries and open plot points in season 1 that were largely resolved unsatisfactorily in season 2.