It's actually funny because anyone complaining about the marines killing a bio titan haven't actually done the mission because it isn't like you're swinging at it with a chainsword. Same with the bitching about the hive tyrant, after it was already blown up, dropped multiple stories, had a building land on it, and was permanently impaled with a steel beam.I’m sorry, people are angry about characters doing epic yet improbable shit in a setting built around doing epic yet improbable shit?
Also they sound like people who have never actually played tabletop, because situations where some bullshit little unit needs to take out a tank, wounds on a 6, tank fails a save, tank explodes and does damage to other nearby enemy shit does happen.