We are
Fenno's paradox people.
We hate Congress as a whole, but we like our own representative.
Consider the 1994 wipeout of the Democrats in the House. Going into the election, they had 258 seats. They lost 54 and came out with 204.
But 34 of those 54 were races involving INCUMBENTS, and the most vulnerable a Congresscritter ever is is in their first attempt at re-election, and they lost 16 of them. Three more involved Democrats who lost to other Democrats in the primary, two of whom won the fall election (one was Sheila Jackson Lee, speaking of people we wanted out of office). And one more involved a GOP rep who lost his primary.
Republicans won 22 open seats, Democrats won 4, a net gain of 18 for the GOP. So that basically means that in 405 seats there was an incumbent running for reelection (435 minus 26 open seats minus four incumbents who lost in the primary). Not a single Republican incumbent lost in the general election, and the Democrats still won 204 seats despite losing 34 incumbents.
Basically - even in the worst wipeout year of our lifetimes in the House - 83.9% of the incumbents STILL won.
The Senate, of course, is much smaller so the percentage can be higher. There were 33 seats up for election, but NINE incumbents retired (6 D, 3 R), and the GOP picked up 6 of their 8 Senate seats DUE TO RETIREMENTS, not winning against the incumbent.
That means there were 24 races that featured an incumbent, and the incumbent won 22 of those 24 (91.6%). The only two "incumbent" losses were Harris Wofford, a Democrat who had been appointed to John Heinz's seat when he was killed in a plane crash and won a shocking upset against Richard Thornburgh in 1991, and Jim Sasser of Tennessee. The GOP then picked up two more seats when Shelby and Campbell jumped parties after the midterm.
My point, evidentially speaking, is that even in the biggest wipeouts we see nowadays, at or near 90% of the incumbents still win.
And yet Congress more often than not has an approval rating below 20% regardless of which party runs things.