I almost died the 1st 2 times and did die the 3rd time.

To avoid being blown up by dynamite, I place the dynamite and swim RAPIDLY UP. You may get no damage at all if you swim up!

The antidotes are crafted in the water distillery.
Use the mill to crush items and turn them to powder.
Place the powder(s), sea water, and wood into the distillery and it will make all sorts of interesting things ;)

So it's a bug or a problem?! Because it too difficult to not die after the explosion.

I think it is meant to be a bit difficult. But maybe it is too powerful if everyone dies the first time they try to place dynamite. I think we should have better warnings in the dynamite description so we know we need to swim away fast to avoid death.

if you hold down the "W" Button and Spacebar at the same time you actually swim to the surface faster I take no damage from it.

Ok thanks for everyone

how to swim faster with controller?