I want VAR to be a thing, but before being impletemented it needs to improve. If it's implemented like this, it will kill the sport. The fact that so many top leagues have accepted to use it already is unbelievable and I wouldn't be surprised if next season after a couple of weeks most fans will turn against it.
I'll quote a post from the Confederations Cup since it's exactly how I feel:
The problem with the current implementation isn't in the goals that are ruled out offside. It's the correct goals that are the problem because if this is implemented like this you won't be able to celebrate goals anymore. Neutrals are looking at it and thinking it's fair and it works great but when your team is involved you will absolutely hate it as everytime the balls goes in you'll have doubts on the back of your mind and you won't be able to celebrate your team scoring a goal until a minute later. The ectasy of celebrating a goal completely disappears if the decision takes that long. Until they can reduce the time of the decisions from 1 minute to 2 or 3 seconds, VAR should not be used to review goals.
After this, there's also two other problems: as we saw in Club World Cup or in the U20 World Cup, it will not be completely accurate. The controversy in the game will be smaller, but it won't go extinct. When the ref messes up even after VAR there will be even more outrage. And the other problem is that the ref is the one deciding when to use the technology, which will mean there will be times where he'll make the wrong decision and not call it (tonight Cameroon should have been 1-0 up against Chile for example) and times where he'll call it too many times when he really shouldn't, slowing the pace of the game down.
In my opinion, VAR should be used for penalties and red cards. For reviewing goals, until they manage to reduce it to 2 or 3 seconds it should not be used. I also think before implementing it in the big leagues they should at least experiment the tennis challenge system with some kind of rules to prevent time wasting. VAR is a good idea and I'm all for having a fairer sport but the fact it's being implemented as soon as next season in many top leagues without barely any experimentation or improvements is a disgrace and it will end with most fans turning against it