[yeaman1231]

The most egregious as someone who is in the left bubble but acknowledges nuance on many issues I would say are:

identity politics: economic problems are economic and fixating on identity is never going to solve them but further alienate people. What this sounds like is disrupting meritocracy "we <insert combo of minority identities> president or engineer... etc" but in reality is nothing but an extension of confessionalism, which never works. Look at where such politics ends (Lebanon's current crisis <-- https://en.wikipedia.org/wiki/National_Pact, Iraq's current crisis <-- https://www.mei.edu/publications/nation-or-religion-iraqs-hy...). Increase representation by fixing the pipeline problem not instating qoutas without sunset deadlines or criteria

scientism: the usage of phrases such as "believe science" when talking about social issues like abortion where worth is assigned to lives and even ignoring it completely when talking about puberty blockers. Never mind how anti-scientific "believe science" is.

American exceptionalism: A lot more subtle than the right's "shithole country" comments but no less dangerous, look no further than how Poland is talked about, or Hungary... etc. Can't fathom how different societies look at issues from other perspectives. This is a form of cultural imperialism.

All of the above are subject to your definition of left and are points of debate within the left too.