How long ago was that? I doubt it was the v14 software. The software has become scary good in the last few weeks, in my own subjective experience.
No, you do not "become scary good" every single week the past 10 years and yet still not be able to drive coast to coast all by itself (which Elon promised it would do a decade ago)
You are just human and bad at evaluating it. You might even be experiencing literal statistical noise.