The only reason we have VAR is because people don't accept the debatable nature of those decisions.
Fans not accepting certain contentious decisions was part of the passion of the sport. Being upset at a bad call during a knock down drag out match is really a sign that fans are fully engaged in the match. If a ref makes a bad call, it's perfectly normal and a sign of a healthy sport for fans to be upset by the call. And to carry on about it afterwards if the result doesn't go your way. That's what we're supposed to do, it shows you have a good memory, it shows you're fully invested in what you believe is fairness on the pitch. What happens then is that after the match, the referee reviews the film and he may realize that he made a mistake (if he did) which causes him to be a better referee in future matches. That's how it works.
The whole idea that it's a problem for fans to react to contentious decisions is idealistic rubbish. That's supposed to be there, that's part of the passion!! The people behind VAR were thinking : hey, we can eliminate this "occasional" controversy. No!! That's what fans need when a match doesn't go their way. They need an outlet, and excuse for why their team lost. Sometimes fans go overboard, but that's all part of it! That's a fan's right to be able to call out bad decisions and remember certain decisions that went against them. That "occasional" controversy that used to exist is literally part of the charm of the sport. When a bad call goes against your team, it sucks, BUT when that happens, any bad decision has consequences. Sometimes a bad call happens during a match with enough time still for your team to overcome that adversity and fight back to win or draw. And sometimes it even creates legendary moments.
I'm not tying to act like it's a fun experience when a bad call costs your team a match, but it's not even close to as bad as this situation we have now with VAR where pretty much every match nowadays drives you mad because you can't fully live in the moment anymore and that's really the best part about football, the moment that the ball hits the back of the net. That unmitigated jubilation is gone, and that's everything to a fan. Before VAR when a contentious decision happened, rarely was it such a howler that you couldn't cope with it. When it happened, it was something to be outraged about, it was something to talk about, but the feeling that your team were wronged with a decision sometimes has a way of bringing a fanbase together even more. It's something to remind your rival friend of the time they won a match that they shouldn't have because of a bad call, it's something you would tease about at the pub. It's part of the social construct of football, and it ends up being part of history and part of the storyline heading into the next match between those teams. What I've found is as undone as you feel in the moment of a bad call going against you team that costs you a match, once the dust settles, it only increases your passion for the future, your looking forward to that next match.
The problem with VAR is you no longer get that feeling of looking forward to the next match as much because you know VAR is there which will cause additional disruptions and more controversy on an ongoing basis. When a bad decision happened in the past, before VAR, the referee would have that on their conscience and it my even cause him to give your team a break in a future match. It may not, and I'm not one of those people who say decisions always used to even out over the course of the season, but sometimes it did. And even if it doesn't, it's often something that a team can overcome, either in the match or over the course of the season. That occasional feeling of being wronged is not worth this, what we have now is an ongoing feeling of being wronged and annoyed. More controversy, more unnatural stoppages, and an ongoing heightened sense of nerves is not better than the rare passion inducing howler. VAR creates a bottomless passionless pit of nothingness and robs a match of its soul.