The Congress is not supposed to be popular!
Individual representatives and Senators can be popular, but as an organization, it is their job to exercise their duty and legislate for things that, often, a majority of the country does not agree with. They also have to block things the Executive does (which might be very popular) for the good of the country.
It is why we are a Representative Republic, not a pure Democracy. In a pure Democracy, majority rules. Heck, everyone wants no taxes and full government services and would vote for that given the opportunity. Of course, that is impossible. So, legislators have to be the bearer of bad news - we need money to provide services. And we decide what services are truly needed. Who is going to be popular with that? (Oversimplification, yes; but you get the point.)
The whole narrative about the popularity of Congress is laughable. False premise. I don’t want them popular, I want them to be responsible, or as close as divided Government can be. (No comment on current state of affairs, but much better than a few years ago!)
the rest of these comments show why the GOP is failing............
” it is their job to exercise their duty and legislate for things that, often, a majority of the country does not agree with.”
Not really. They are there to execute the will of the people, within the bounds of the constitution, not to be some ersatz diluted dictatorship. If the majority opposes something, and they ram it down our throats, that is tyranny.