I'll offer a near miss.
Chat amongst colleagues over a coffee, the topic was something very normal and mundane: how lazy are we about cooking.
My colleague Carol said, "sometimes I just throw some chicken nuggets in the toaster because I don't care or have the energy"
My response I intercepted between the brain and mouth: "living the bachelor lifestyle, carol?"
Carol's husband had died quite suddenly 6 months prior. I didn't fuck up, but I almost did and it haunts me still over a decade later.
I'm with you in your frustration, but this only furthers a class of elites being eligible to govern. The test needs to be at a level that anyone going through compulsory education could pass. Eg 8th grade.
Additionally, I would do the test at candidate registration. There is no pass fail, but the electorate can decide if they're qualified enough (as it's the right of the electorate).
Maybe it doesn't fix it fully but we can directly point to who is a moron, and who voted for said morons.