I bet you'll find that more people don't approve of what their representative is doing than do approve.

Low voter turnout allows for bullshit to slip through the cracks by targeting very small blocs of voters.

I genuinely believe that most problems in government would be fixed if voluntary voter turnout was around 99%, and that low rates, especially during midterms, is the largest threat to democracy in the United States as we know it to date.

What data? I've never seen data showing people approve of their Congressperson. Especially if that person is a Democrat.