You speak as if the democrats cooperating with republicans is a flaw on their part. They don’t exist in a vacuum — they have to deal with the American public.
The majority of Americans are for basically all progressive policies, particularly when asked directly about a policy rather than a party or politician.
The issue is not the American people (of who MAGA chuds are 30% at best) the issue is that Democrats and Republicans work in concert to rig the system and deny the people access to politicians who are actually willing to implement popular policy.
This corporate circle jerk game (fueled not inconsiderably by Citizens United) is why the fascist roght is able to keep pushing our institutions further t9 the right. Establushment Democrats and Republicans are so busy gorging on lobby payouts and shoving AIPAC money ip their asses that they literally put up no resustance except when it comes to changing the status quo. Which is when they turn and will snarl and bite at anyone who tries to interrupt them.
So no, it is not "dealing with the American people" it's deliberately side stepping and suppressing them to loot our nation's legacy.