Sadly, this nails it.
My team vs your team. But not like a softball league where everyone gathers at the bar together after the game.
In sports, it's appropriate for both teams to try to win, but not by having everyone on one squad, from the manager on down, flagrantly break the rules of play. Fortunately, there are referees and other officials who have the power to eject people from the game to prevent or limit such behavior.
But the analogy isn't perfect, since winning on the field isn't meant to be in furtherance of improving people's lives, as it should be in politics and governance. Still, it used to be that Republicans, Democrats, and Independents could cooperate for the common good, and would at least be confident that norms of conduct would generally be followed. And, if they weren't, Republicans would act, as they did when they convinced Richard Nixon to resign.
No longer, and both sides aren't equally at fault by any means. Democrats are imperfect, as all humans are, but most are at least genuinely interested in passing legislation and implementing programs that provide solutions to big problems like climate change, infrastructure decay, healthcare inequity, and pandemics. Unfortunately, far too many Republicans just want to make life miserable for their perceived opponents, and are willing to do anything to remain in power to do so.