The main cases I've seen against people on the left (non-exclusive) are:

- Lots of them in Epstein files

- Mass importations of unchecked non-citizens

- Trying harder to look cool to Europe vs helping Americans

- Overregulation (things like California Coastal Commission)

- Massive fraud (LA -> SF bullet train, tens of billions for "homelessness" that don't go towards homeless at all, building permits, etc)

- Antifa burning down 3rd party businesses for reasons unknown

- Attempts to squash 1st amendment, particularly on gender

Since you linked sites like the Guardian and Atlantic, I figured the bar was low enough that you can just google any of these points and find an opinionated piece of similar quality.

The bubble I refer to is the fact that seemingly all you see is the bad on one side and good on the other. As easy as you claim one side are Nazis trying to kill off non-whites, the people on the other side claim the left is trying to force movie/music propaganda to eradicate all white people. Both sides have millions of posts from terminally online people wildly claiming outrageous things. Both "sides" have bad people. If you can't agree to that, you are in a bubble or just lying.