That was a derailed train my friend

In my opinion, the difficulty levels are built in.

If you want to play the game, the main story line is tough but certainly achievable with some practicing and strategy.

Let's consider the base game up to the bass final boss fight "easy." There are certain achievements that require fighting different bosses that are more difficult.

Then, there is the Pantheon of Gods which is absolutely fucking sadistic.

I love this game. I was absolutely horrible when I started. I played this game alone and no other game for weeks or months. I got every achievement. Except one. I cannot beat the final boss of the pantheon of God's. And I'm at peace with that. It is an achievement that must be earned with no easy way out. I think that's part of what makes this game special. If you're looking for a quick game to 100% or get a platinum trophy on, this is absolutely not that game.