Warp core ejection always fails. Is nobody at Starfleet talking about how their ships are all practically just time bombs?
Computer: "Warp core breach imminent."
Commanding officer: "Engineering! Prepare to eject the warp core."
Me at home: "That's not gonna happen. Better just skip to whatever your next idea is."
Chief engineer: "We can't eject the core, Captain! Magnetic seals or clamps or whatever, blah blah blah"