In some places the food sourcing is different, such as in Australia where they like to point out that they can get beef, apples and potatoes in that country.

Another factor is whether they have deployed the "Made for You" kitchens (those ones where they're always opening & shutting what look like small drawers). I think that system really helps with the taste.

Lowest on the totem pole are places where they have to import frozen ingredients and then put them through the old-style kitchens. Indonesia probably qualifies, and I'm sure the Philippines does as well. Places where they operate in a very small physical space also are suspect.

OTOH, I think Burger King is much worse with the "freezer taste" problem in those countries.