It's not the VAR itself that's bad. It's the way they are integrating it into the game.
Technically, the Spanish player made contact on the US player with her foot up/out and studs showing. To me, the point of VAR is to assess the actual quality of the contact. Like was it truly bad or was it a bare brush with the player then flopping like a fish? Instead they are using VAR to apply the rules literally. Like to confirm whether that foot was within 1/4 inch of a leg or if it actually touched a leg.
If you're going to do that, then you have to VAR everything. But they don't. To me, I feel like you can just grab a player and wrestle them to the ground and if the ref misses it, they miss it. They're not going to VAR the obviously blown calls that could make someone look bad. They're going to VAR the really borderline calls so they can say "Yes, there was contact" or "No the player was .0001 inches onside." Those are actually the plays that are the least bad because they're so close to 50/50 in the first place.
VAR isn't helping the officials or overturning awful calls, it's mostly just determining whether .5 +/.00001 should be rounded up or down.