Referees will, in real time, make mistakes as that's the nature of competitive sport, especially at the highest level of football with the speed and intensity.
Whilst I would always hope for an improvement of referees, I accept it would never be perfect. I envisaged VAR as being a way of improvement, as you said.
Instead, we now have more controversy than ever, with referees having x-number of angles and technology still making horrendous decisions.
We now have referees making calls that appear to blindly ignore that football is played at the speed and intensity I mentioned; games are micromanaged.
I don't care if someone is 2cm off-side; I don't want fouls being awarded where it's taken someone to slow down a video and remove the real-time element.
Statistically, they are getting more decisions correct than ever, but that ignores that some of these said decisions were never an issue in the first place.
I watch non-league football as well as Everton, and yes there's some ludicrous (almost laughable decisions) but in the mainstay more enjoyable to watch.