I liked the idea of VAR but the way it has been implemented and used is utterly appalling and it really hasn't improved. The concept itself is flawed, it is slow, nit-picky and adds a level of anxiety for very small things. I saw one game recently where a penalty was awarded but then the ref brought it back for a penalty to the other team from 2 minutes before. It's just ridiculous and now even more farcical as in the womens world cup, goalkeepers literally have to now stand behind the line in fear they encroach merely a centimeter and give the ref an excuse to have it retaken.
The biggest flaw in VAR so far is how it's made referees forget the basic rules. They see a handball in slow motion and give a penalty on the basis it's hit the hand rather than deliberate handball or ball to hand. Incorrect decisions of this nature have been rife with mistakes made (IMO) in the World Cup Final, Champions League 2nd round, Quater Finals, Semi Finals and Final where penalties for handball (ball hit hand) were given without any consideration of the rules and a decision based off of whether any part of the ball hit the hand in 25% speed. Refs should not be allowed to watch slow-mo close ups to form a decision and it's like they suddenly under pressure forget the rules to formulate their verdict. The amount of referrals is daft and any made should see the ref watch the incident in real time speed from an angle that represented his position (or near enough) on the field at that time. The definition of handball should also appear on the screen to remind them of the rules. Slow mo should only apply in cases of dubious tackles to determine whether the player or ball was taken first, NOT handballs.
The next flaw is the ref itself. I don't believe the on pitch ref should be be consulted and have the final say on any incidents. A panel of 3 watching the footage should have the final decision and must be unanimously agreed without the game stopping. This decision would then be relayed to the pitch and the match ref would then take the necessary action based off the decision. With refs getting decisions wrong even after watching video evidence, a larger jury is needed. This will cost the governing body of each match more but it's fairer.
Lastly, the amount of times VAR is used should be reduced to just goal-related aspects. Too many incidents are getting referred and it's getting awfully anal. Potential red cards, yellow cards, offsides, handballs and all the other bullshit. It's just too much and spoils the experience now, made even worse by how they handle it and the level of trust in decisions made even with it right in front of them.