[....]I also don't know for sure whether the VAR decision for the goal scored by Garnacho was correct or not because after that incident it was Arsenal who managed to turn things around.
What are you trying to say here? Arsenal's last two goals has nothing to do with the disallowed MU goal. If you have a problem with the call then point it out on a technical level and not come of as someone saying MU was robbed of that goal so Arsenal could win. Garnacho was offside by the slightest of margins.
If in the Manchester United vs Arsenal match there are still those who blame the referee's decision, it is a sign that the Manchester United fans are trying to dismiss and do not want to accept the fact that they lost to Arsenal. Even though many of Anthony Taylor's decisions are often controversial, in that fight, in my opinion, he showed fairness and professionalism.
Actually, it is quite natural that there are still those who discuss the referee's decision, especially when it was very thin when Garnacho's goal was disallowed by VAR. But once again in this condition we also have to realize that the function of VAR is to anticipate things like this so that the referee's decision is not wrong in giving a decision so I don't think it can be argued because in the end they can still maintain a draw it's just that Manchester United can't do that.
Instead of blaming VAR for the defeat I think it would be wiser if we highlight how fragile their concentration is because seeing from the conditions that occur when time enters crucial time (the first 10 minutes and the last 10 minutes) Manchester United always lack focus and this is not the first time it has happened for them to lose at a crucial time.