Even if your cynicism is justified, it is in the self-interest of the Congress to get rid of a man who is dragging the whole congress down
It's not cynicism it's the truth.
Ask Matt Bevin how it went for him when he primaried McConnell.
That race is what gave us Mitch's famous quote about crushing the TEA Party.
Political animals like McConnell and McCain know how to play the game and survive. That's why they can say and do the most Liberal of things 5 out of every six years of their term...then suddenly start talking like a Reagan Conservative at election time.
Don't make the fatal mistake of thinking everyone is as aware on a daily basis of politics as the people that post in forums like this.
They aren't and as long as it doesn't affect their daily lives they don't care.
Politicians like McConnell bank on that lack of interest to stay in office.