It’s not a dick DM move as much as a lazy move. But it might feel like a dick DM move to some of them.
If the idea is to make them weaker, give them a long-lasting debuff rather than removing levels. 50% HP, -4 to attack rolls, etc. Removing levels requires a lot of work on the player’s part, and feels like it takes the game backwards rather than forwards. Giving them a debuff that they have to work to restore, on the other hand, feels like there’s a path forward to advance towards.
So you decided to make a pro-China anti-US argument by linking to a flat-earther meme?
You alright there?