The main reason why VAR is so bad is because of the incompetence of the people who are using it. The match and VAR officials are mostly all abysmal so until that is improved (which is unlikely) VAR will continue to be crap and needs binning.
It's overstepping what it was designed to do. It should be there to cut out the absolute howlers only. If you have to look at something from 5 different angles 15 times, it isn't clear and obvious!
Somehow our VAR has decided to become the remote referee. That said probably the Forest game was a good example of what it should be like. It had contentious moments but if you can't work out in a couple of seconds it's wrong, go with the on field decision.
The problem is everyone jumps on that in the media after the game and then they feel they have to pick it up the next time around. And because of that there will always be pressure to use it for almost everything, so they need to bin it.
Challenges might be an option around that but we need to make sure the game isn't broken up like it has been under VAR.