A few points:
1) VAR hasn't been around for a year, it's been around in the PL for a year.
2) That's an important distinction if we're talking about VAR evolving, because it has evolved in other leagues since it was first introduced. In fact one of the main criticisms you could level at the PL version is that they didn't learn from other leagues' mistakes despite being one of the last to implement VAR, be it in terms of the use of pitchside monitors, having a consistent rate of interventions throughout the year or communicating decisions (compare to the audio we now get from the A League or the videos explaining decisions that the MLS do with the PL's lack of clarity).
4) Beyond that, the tech has evolved since VAR was introduced, particularly in terms of offsides. The current hawk-eye 3D imaging wasn't in place initially and semi-automated offsides are due to be in place for the Qatar World Cup. Which is tangible and incontrovertible evolution.
5) It's also important to bear in mind the anticipated timescale. About a year ago IFAB openly said that it would be a decade before they really know the best way to use VAR, based on the feedback they heard from those who implemented similar tech in other sports, like the TMO in rugby (which did indeed take a long time to get to where it is now with a lot of early teething problems). So nobody involved expected the evolution to have come to a conclusion at this point anyway. There's still a long, painful process to go.
6) All that said, there are still glaring problems with VAR generally and the PL's implementation in particular has been an unmitigated mess. So there's still plenty to criticise. And the changes to the rules haven't been a help either. The change to the handball rule this year has actively made things worse, for example. So if we're grading it on the year + since it was introduced in the PL, it has been a frustrating failure.