Can you remember one threat they made, then executed the action they threatened to take?
Yes. The unspeakably duplicitous betrayal of everything the Senate once stood for by blocking the nomination of Merrick Garland. The thwarting of the will of the voting public by blocking Obama's legislative agenda (and more recently bills on gun control) for political purposes. Refusing to bring to the floor of the Senate for votes the hundreds of pieces of legislation passed by the House. The refusal to sign on to a bi-partisan letter before the 2016 election warning the public of Russia's interference in the election. Those are a few that come to mind.
Signing off on trillion dollar deficits. Signing off on the largest government spending budget in US history. Signing off on a far left protectionist tariff war. Failing to come up with an Obamacare replacement after ten years, hoaxing the rubes for all that time, making it blazingly obvious they sold us down the river to single payer healthcare decades ago.