The actual problem is fairly simple: Over the past three years McDonald's pricing has become delusional, especially considering the quality of the food. They were able to coast on consumer habit for a while, but their salad days are over (literally and figuratively).
To keep it a bit tech-related, their mobile app is terrible, even by fast-food app standards. It's not native, it's janky and slow, it tends to crash if (to provide a real example) you don't give it two seconds to increment a quantity, and the UX design is embarrassing. They also removed customers' ability to edit or cancel orders, even though no food prep is started until you arrive and users must verbally communicate the alpha-numeric mobile order code (even though the app knows that you're there).
https://www.vox.com/politics/2024/1/9/24027094/fast-food-pri...
To keep it a bit tech-related, their mobile app is terrible, even by fast-food app standards. It's not native, it's janky and slow, it tends to crash if (to provide a real example) you don't give it two seconds to increment a quantity, and the UX design is embarrassing. They also removed customers' ability to edit or cancel orders, even though no food prep is started until you arrive and users must verbally communicate the alpha-numeric mobile order code (even though the app knows that you're there).
A real screenshot of the McDonald's app on my phone: https://imgur.com/a/IAh4Ybl