[....]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.
Well for me the referee really influenced the game although it's not a new thing but it's usually favours the opposite team. But that being said Manchester United really played well if not because if the last minute pressure and error that came from their back, I think they would have secured a draw or even won the game but thats football no really is finished untill the final whistle is blown and this theory was practice in the game between this two rivals.