Is anyone else here severely underemployed (or not employed in their field of study)?

How do you cope with feeling like your brain is literally atrophying by the day? I try my best to always keep my mind active during downtime or when I get home but I'm still struggling.

I work as a freight broker and I deal with extreme brainlets all day long (Immigrant truckers that don't speak english, braindead people working in the shipping/receiving departments) and my co-workers usually have barely finished highschool.