Nobody is arguing with the concept of offside, it's the interpretation of it with the new technology that's the problem. Big toes, knees etc millimetres offside, that's impossible to judge if that was correct t when the ball was kicked, it's ruining the game and fan experience big time.
Also if VAR is here to stay it should apply at all levels of professional football and not only top flight games, euro competition and internationals etc.
It was sold as only being used for clear and obvious errors that the onfield officials missed etc and not the forensic examination of every goal, offside, possible penalty etc that we are seeing now looking for reasons to disallow them.