The most notable things I recall in the last few Congresses were Mitch McConell stealing a SCOTUS appointment, the failure to remove Donald Trump from office (twice!--once for inciting an insurrection in front of the eyes of the world; it was literally televised) for political gain, and the voting down of Republicans' own immigration bill (again for political gain).
Thats what happened. Pepperidge Farm remembers.
That... doesn't seem to answer GP's question at all?