Are American politics 100% confirmation bias at this point?

It seems like every american I hear online has the most extreme bad faith arguments about how their side is good and the other side is evil. Is this due to algorithms pushing their preferred extreme narrative onto their page and them not realizing how algorithms work? Are they all just searching "why is my side right on xyz" without realizing how the internet search results work?

Ive never seen such extreme polarizing (idiotic) takes by such a large group of people. Its like they all just find the piece of information on the internet that makes their side look the best and say "yup, thats the one i choose to believe"..

I dont see other countries (outside of North Korea) this convinced by propoganda, yet its like every single American is convinced of the dumbest propoganda they can find on their side