One of the big issues for me, besides the delays making it unfeasible at the moment, is that it was originally meant to be used for clear and obvious errors, not something you need to see four or five times in slow-motion without being entirely convinced.
I agree with you, which is why I don't support VAR. Penalty decisions regarding handball & fouls rely on the interpretation of someone, which in most cases people will always disagree with, as many of the cases are so minor, & should be left to the referee unless clearly wrong.
What people are complaining about today is VAR being used in Man Cities late goal, & disallowed because a city play handballed it on the way through to Jesus. This rule was brought in at the beginning of the season, & stated that any handball involved in the build up to the goal, whether accidental or not, would be disallowed. All players & managers, unless completely thick, know this, & what will happen. The Wolves players & manager complaining last week, plus the Man City ones should be dealt with severely by the authorities for their childish tantrums, & perhaps future idiots will keep their mouths shuts.