I once saw someone say something like this: "Working in a monopoly mega corp is like working for a 20 person company, connected to 20 other 20 person companies, connected to 20 similar entities containing similar 20 companies, with each group of 20 persons in each competing with each other for investment/budgeting."

Maybe hyperbole... but to some extent I think that's about right. It's like you're not even a cohesive unit other than that thin marketing veneer facing the outside world.

Things are often built in silos. Integration of products is almost always an after thought. Decisions/changes are done in response to outside markets or internal political games for promotional appeal and money. The turnover of people retiring, new hires coming. Most every mega corp today is nothing like it was 30 years ago. And so, things typically end up half-baked and the customer left wondering why the products are often such a mess.

Now some companies do things better than others, and may have their stellar areas and their bad areas. Same goes for cities, and even countries, when you think about it.