OMG seriously? possibly the stupidest most unrealistic suggestion ever! 🙄
when exactly would he have had time to do this?
by the time rose rescued him from being handcuffed in the room most of the ship was already underwater.
Do you know how hard it is to just "break a door" off? Let alone several. Where was he getting stuff to 'lash doors together' with? And enough life jackets to make it buoyant? People were WEARING any lifejackets they could find! And they weren't that effective anyway, you're talking about heavy1912 lifejackets btw, not our current easily inflatable ones!
Not to mention 'just launch it and float out' 😂 Oh yeah, really easy. The film showed how hard it was to launch the lifeboats effectively, and they were proper vessels with whole winch systems, not a few splintered doors stuck together with a hope and a dream.
You wouldn't want to spend a second longer in the sea than necessary because it was well below freezing, so you wouldn't launch your unrealistic impromptu raft until the ship was pretty much completely sunk, and the whole point was they literally didn't believe it would sink anywhere near as quickly as it did. But on the other hand if you did wait until the last minute then your raft would have got sucked under and would have broken up anyway with the force of the water.
If you've ever done one of those raft team building exercises most people don't end up with anything vaguely seaworthy at the end - and that's with more time, multiple people, and all the appropriate materials available ready for you, making it on a steady surface in full daylight in normal temperatures, to launch from a flat surface onto a slow moving lake or river. Not one man tearing doors off a sinking ship in a life and death situation in pitch dark in the middle of the atlantic at minus temperatures!