Is it correct to calculate the damage?

I ran into this problem. I'm playing on Kitava's Forge and I'm putting everything into defense. I had no problems in the last league, but in this one it's like the mob damage has gone back to 0.2.0, when it was basically impossible to play with melee skills because of the insane damage the mobs dealt.
Am I correct in understanding that by increasing the HP of monsters, you also returned the damage to what basically prevents playing with melee skills?


Maybe I'm weak to mobs on T1 maps?
https://imgur.com/a/zumfIkd



The game still takes 2-5 minutes to load, now in the hideout.

my computer:
3060 12gb, 12400f, 16fgb RAM