In the original envisioning, yes; typically, 100% was set at a stretch goal, with ~70% being the more actual target. >= 70% was thus successful.

But, most of the places I've seen doing "OKRs" are just appropriating the word but not the actual system.

The point is that you set a goal and made progress towards it. Ideally you choose goals for yourself and it's expected that you won't complete them all.

I still don't like it.