So it looks like I'm spending the entirety of the adventure's only significant combat mind controlled against the party.

I'm thinking that, whereas mind control takes the player out of the game / robs them of agency, and despite the fact that magical compulsions are part of the source material (Lord of the Rings for example, also Jason and the Golden Fleece), maybe mind control effects targeting players shouldn't be a thing in D&D.

What do you think? Do you agree, or is that ever-present risk part of the fun?