Seems that she knows its expensive, decides to park there anyway, then complain about it publicly rather than e.g. to the management or someone who can do something about it.

Youre not a 'mangsa kapitalis' if you chose to drive into a high-end mall when there are other options. If youre trying to get internet pity points then youre not in a position to complain when it backfires.

Judging by the high utilisation of its parking spaces, the market doesnt agree with you.

But can afford it then it is not overpriced

The car park management didn't force anyone to park there.  It's own choice.

It's just as if one walk into Starbucks and order a coffee, then complain expensive.