I recently changed jobs (also interviewed at FB, though I didn't do well) and none of the interview questions were at LeetCode hard level. There was maybe one

I recently changed jobs (also interviewed at FB, though I didn't do well) and none of the interview questions were at LeetCode hard level. There was maybe one question that I'd say was objectively hard (because it was completely unexpected and blew my mind - fortunately I did it OK) - but I don't think practicing LeetCode hard level would've helped there anyway. And then several questions were barely above LeetCode easy level and I had a brain fart. (Should have practiced binary trees a bit more, dammit.) IMHO LeetCode hard level is a waste of time, unless you know for sure that the company you're preparing for gives these questions.