This is the key point. This dysfunction was _by design_. The Republican party has been working on this since Nixon was impeached. Through redistricting, Fox News, and changing politics to "warfare" by Newt Gingrich and Rush Limbaugh and their ilk, through McConnell stonewalling Congress and refusing to hear judicial nominations.
The Democrats are complicit by trying too hard to play by the rules and take the high road, but it's not a fair comparison of culpability in the slightest.