[alistairSH]

From the tone of your post, I take it you're young and just starting your career. A few short jobs shouldn't be a red flag at this point in your career, especially if you have a reasonable reason for leaving previous positions (and company culture at Uber certainly qualifies).

As for having a known toxic company on your resume, that should only be a red flag if you were in a position to alter that toxic environment (senior manager, HR roles, etc).

If I were in your shoes, I might be looking to move elsewhere. But, unless you're unhappy, there's no need to hurry.