It doesn’t scale, the game can be quite though in the beginning. First time I’ve beaten the game it took me hundreds of tries.

Now I can almost always complete every run with each character.

Late game enemies tend to have more health and cursed enemies have double or triple the health but it’s always the same.

There lots of weapons, passives and synergy’s that upgrades your damage.

If you unlock l something like the make shift Canon it can one shot bosses straight away.

The game does have a damage cap but with enough synergy’s and passives you can even break that.