Probably one of a few things.

• always voted R
• one or a few, policies matter to them more than anything (abortion, tax cuts etc.)
• likes the toxic traits (owning the libs, bigotry, pro America and fuck everyone else)
• fell for the neo-con lie that conservative = good economy = better for everyone
• fell for the “we’re going to help the working man” Conservative lie

But most likely, imo, is that the average Joe is just way less politically engaged or aware, then you and your peers. They don’t see all the bullshit, bigotry, obvious lies, the way R policies will fuck them over. They just know times are tough, prices are high and “right wing dude said he’d fix it”.