I feel sorry for them, I really do. They make some mistakes and every prick whinges about it in the media or on social media to deflect. They are far from perfect, there is room for improvement but the introduction of VAR, as far as the general public is concerned, has done nothing but brought an expectation of perfection from officials and perfection doesn't exist because some calls are subjective and people will judge them differently. At least before VAR people would often say "ah they only have a split second to see it so mistakes will happen" (albeit people whinged a lot then too).
And your point is correct, whether you agree with VAR or not, VAR does actually pick up a good number of incorrect calls but they get little recognition. Certainly nothing like the attention that the incorrect calls get.
I understand the complaining about the time delays too and it's bloody frustrating in the stadium. But having heard the audio of us v Chelsea, I can understand why. They had multiple things to review, it's high pressure, in front of millions where precision and accuracy is required. All the while, you're under pressure to make a quick decision.
The officials also aren't helped by the rules and the much lower threshold for cards (particularly red), what constitutes a foul and handball.
I also see at grassroots level an increasing frustration with officials to the point they are sometimes in physical danger and often subject to verbal abuse. There have been a number of incidents over here (not just in football) and quite a few in the UK I believe. I honestly believe that filters down from the top. Officials have become fair game for spacegoating and abuse.
I'd rather be a Woolwich fan than a match official...okay maybe not that extreme but you get the idea.