Ask HN: What lie to say at interview about my previous Uber-like employer?

It is a common wisdom that you should not talk bad about your previous employer, no matter what. I understand there may be very good reasons for that [1], but that also means I should be dishonest when answering future employer's questions.

Let's say my previous employer was Uber and I left BEFORE everybody knew how toxic Uber culture is [2]. Not only that - everybody knew Uber is a unicorn, successful and dynamic, using cutting edge technology, certainly a stellar career opportunity. So why did YOU left only after X months?

I can either avoid the question or lie, both put me at a disadvantage. Saying "I left Uber only after X months to spend time with family or reevaluate my priorities before choosing my next career move" [3] just sounds like a total bullshit.

[1] https://www.reddit.com/r/jobs/comments/1ptqwv/why_is_talking_bad_about_a_previous_job_a_taboo/

[2] https://www.theguardian.com/technology/2017/mar/07/uber-work-culture-travis-kalanick-susan-fowler-controversy

[3] http://www.wikihow.com/Discuss-a-Former-Employer-in-an-Interview