This is the bane of all "live service" games. Publishers want that infinite cash flow, which means newer enemies that are harder to kill than older enemies in order to give players a reason to farm more powerful and newer weapons. It's an ever-spinning hamster wheel that can never be properly balanced.

And yeah, every time I peek into whatever the players are complaining about regarding balance it's the most asinine thing imaginable. I stopped paying attention to most of it, but the last I looked the typical dompamine-addicted crowd were complaining that the hardest difficulty setting was... too difficult??!?!