Clinton does nothing good, people get tired of Clinton, Bush wins.
Bush starts two wars, erodes civil liberties, renditions people to Guantanamo bay, accelerates the creation of the modern technological panopticon, crashes the economy, people get tired of Bush.
Obama wins promising change, does nothing good, further cements the precedent that wars and assassinations are done by executive fiat (this one has really backfired in the last month), life continues to get worse for everyone, people get tired of it and want change.
Trump wins, does nothing good except send people cheques during Covid. People get tired of him and elect Biden.
Biden does nothing good, and also ends the Covid assistance, and supports Israel in a genocide. Trump wins again.
I don't know how anyone can look at the last 30 years and think that having a Democrat government results in anything other than things getting worse at a slightly slower rate than under the Republicans, followed by another Republican administration where things get worse at an accelerated rate. Refusing to criticize the Democrats is basically the worst thing you could do if you actually want to get out of this death spiral.