I've now shipped five AAA games and most, if not all, had problems that'd fall in the bucket you're describing here. I don't think any of what you mentioned is indicative of development hell.
yeah, i've shipped 8 AAA games (most of them open-world) and they often don't come together until the last few months of development. It's just the nature of game development that some systems don't click into place until super late.