No that is just the game.
Mountains you should not go to until you are ready with frost potions etc.

RNG makes the game very different each time you play.... really makes me laugh when people complain all the biomes are the same... they obviously only played on one seed or just don't even try to think logistically for resources ha ha.

The game presents a lot of different challenges on how it generates the biomes and resources. You may have just had a super easy RNG for your first map. I like the exploring to find good resource locations thing so too easy a map is bad for me.

The way you describe your second map makes it sound like a normal map generation.

Take your time to enjoy what the game offers, it can be really interesting at times what you find!

Have a great day!