The head of the senate was elected, so presumably his actions reflected the wishes of his constituents.

Yes but the Prez was blocked from carrying out the wishes of his constituents (on a terrible argument and on that surprise surprise McConnell reversed his position on once Trump was in).

Indeed. McConnell has done an incredible amount of damage to America over the course of his time as a Senator (blocking supreme court nominations, refusing to call witnesses during the first Trump impeachment, use of the filibuster, delaying/obstructing health reforms, and on and on). Quite incredible, in a way (depressing).

I detest what he did and agree his actions were very damaging to the US both short and long term, but I have to admire his political abilities.

Ultimately this is the problem. Conservative voters are the problem. They always have been from fighting to maintain slavery to fighting against women's suffrage to fighting against civil rights to fighting against LGBQT rights. People like Trump wouldn't matter if it wasn't for the tens of millions of conservative voters who support him and who cheer this bullshit on.