Tip would be dont go into the swamp until you have full bronze armor, bronze axe or bronze weapon and upgrade your armor to at least level 2. I may even reccomend upgrading and making a set of troll armor for corpse run armor and or an extra set of bronze armor.

Otherwise the monsters will be 1-3 shotting you even with good food.

The copper farming kinda sucks and takes awhile. My thoughts are that this was the supposed time you may need to build a proper base before the difficulty begins to spike.