system
Given the following post, respond as if you're commenting on Reddit:
human
[General Immortality] You can't die and you've been sunk to the bottom of the ocean. How hard is it for you to find dry land?

So you pissed someone off and they took you out to the middle of the Atlantic, shackled twenty or thirty pounds of weights to your legs and dunked you.  Once you finally hit bottom, it's pitch black and probably extremely cold.

How much of a problem is the pressure?  Are you able to move at least somewhat freely?  What about currents?  If you go with the 'pick a direction and go' strategy, will you have any chance of keeping your bearings in the dark or will the currents spin you around?  What about bouyancy if you try to swim upwards?  Do you have any chance of making it with the weights?
gpt
Assuming you're completely unkillable by any mean being dropped into the ocean would be years or more to escape unless you got extremely lucky. Currents aren't a huge issue deep down but they will nudge you along their path at maybe a few millimeters with every step. The pressure will be extremely painful but assuming immortality you'll survive. It'll take a lot more effort to move along the sea floor than it does in a pool but the main concern is every empty cavity in your body will be collapsed. Lungs eyes ears blood vessels will burts under the strain and everything will be smashed down against itself and other organs. It'll be freezing cold so if you somehow aren't flattened by the pressure your body will freeze solid without regular movement breaking the ice crystals forming inside you. 

Now for the biggest concern and the real reason it'll take so long to escape your fate. It's pitch black down there. No sunlight no stars no moon. Nothing to get your directions right. If one leg is slightly longer than the other in strides you'll walk in a massive circle. And you'll have no way of knowing this unless you pass by the same shipwrecks and undersea mountains that you'll have to identity by touch alone. Unless you can somehow see in some spectrum that's not dependent on light you'll be forced to wander for possibly eternity in the cold black until you manage to get above a few hundred feet to have sunlight faintly light your way.