I would bet dollars to donut holes this as caused by the usurious overcharge to get a baggage cart. I don’t blame anyone for not wanting to pay $6 - $10 for one. They should be a no-charge item in the airport.
BTW, NEVER fly ANY US/Canadian based airline if you can avoid it. They are all, each and every one of them, crap.
If you'd be willing to add most European-based airlines to that list, I'll agree with you 1,000,000%.