I've not seen anything of the Liverpool or Arsenal games, so can't comment on those in particular. But like you say, the original idea of VAR was to correct "clear and obvious" errors, and it's not being used in that way at all. The trouble is, football is often subjective. If it was a case of watching a replay and everything becoming clear, there'd never be any arguments in pubs and on forums, because everyone would be in agreement with what happened. It's not like that though - two people can watch the same incident and one will call it a clear penalty, while the other will call it a dive.
Technology's great for things that can be called 100% - goal line technology to see whether the ball crossed the line. When it comes to fouls, it's one person's opinion in real time versus another person's opinion after watching it for 2 mins from half a dozen angles. But it's still just their opinion.
I'd say it's ruining the game, but the only football I actually watch is Gillingham, and so don't have to deal with these problems
On the subject of VAR, have you seen this from this weekend in Germany?:
A shot going yards wide. One of the subs (from the team defending that goal where the shot takes place) warming up behind the goal stops the ball for them to save his keeper having to go after it. Except, despite the fact he's got both feet behind the line, at the time he touches the ball, apparently about a millimetre of it is still in play. VAR gets involved, yellow card for the defender, and a penalty for the attacking team. Apparently (from what I've read on another forum, although I've not looked up the rules myself), that's the right decision - if a player off the pitch touches the ball while it's on the pitch, it's a direct free kick from the place he touches it, so in this case, a penalty. Strictly speaking, then, not a rant against VAR as such, as they've followed the rules, but how the hell can that justifiably be a penalty? Surely there has to be a little bit of common sense in decisions like this? It's not like the shot was on target and the bloke's run on to the pitch to prevent a goal.