I just don't get it. There must be some reason why they thought such a scaling is good but I can't think of any tbh. I hope it gets significantly toned down by patches eventually.
Lots of designers think that without big numbers, people don't feel progressing. It's the same in WoW, and it's reached such unbelievable height that they had to make a squish to reduce numbers because they had reach the limit of what could be stored into an integer.
It's stupid, it's annoying and it has countless deleterious effects. It's still done. Sadly.
At least DOS2 can be modded. It was really ruining the game.