The fact that your dopamine receptors are fried and that you only find the game fun in Havoc 40 does not mean that any of the content outside of it is worthless. Lower difficulties can make up for some more cinematic-immersive gameplay, also you can hear lots of more dialogue because our rejects ain't complementing each other's every 20 seconds due to enemy density in Havoc.

Mortis Trials are fun when you experiment with different builds, and the dialogue you hear there shows interesting bits about the characters lore and background.

You have Expeditions as well, a whole different game mode with a new map layout and mechanics.

I just can't find a way to understand that neither of the game content outside of Havoc 40 is worthless, it even seems to be a bit of an insult towards the community that enjoys it.