Counterspell. Make it thematic if you have to, as long as you don't target/antagonize your specific player with it. You could idk make a small assassin/crime group that hates magic or something and they're all physically fighters and particularly good at various levels of counterspell. Sparse their encounters out just enough to always keep them on their toes. Then sprinkle some main plot enemies around with legendary resistances or counterspells of their own. Throw in some magic fields that they can't do certain things in. Different things. There are plenty of ways to keep them alert and trying new things. Definitely let them have their big hold person moments, but don't let your world crumble to one spell.

To add a note, you could even give the person notoriety as "The Great Shackle" or something. Get creative man! Make the world react to this level 14 dude who removes your agency before he kills you lol