Yeah, I agree with Dave's suggestion.
Or maybe something with the electrics?
My Old Guard set (in a Gibson Les Paul) sound nicely balanced to me. The bridge certainly doesn't strike me as nasal, woofy, and loose.
It did at first when I tried just now, but then I realised my amp is set for P90s in a strat! LOL
So I got my LP with Stormies out, and a 335 with Mules, got the amp doing what I'd want for a humbucking Gibson...
Plugged the LP with Old Guards in... WOW, why aren't I playing this more often?!?! (Actually, I know, the trapeze marker on the 7th fret is lifting on the treble side and I haven't got round to fixing it yet...)
Yeah, my Old Guard bridge bites and stings and cuts like I want it too.
Bear in mind this LP is fully modern weight relieved. When I first put Stormies in it, it seemed to be lacking some "weight" to the sound I was anticipating. So I put them in an Explorer and took a punt on the then new Old Guards in the LP. Loved it immediately. I don't know whether it was not enough "mids" or not enough output in general that made my usual favourites Stormies not work in this LP. What I'm saying is - if the guitar was lacking "mids" a bit for my taste with Stormies, then that would mean the OG put them back in for me. That would mean the OGs have more mids, and in a more middy guitar it might be too much? It's not that scientific, but my experience is mids can equal "nasal". If I'm getting "nasal" or "boxy" from a guitar, I turn the mids down on the amp. That often works for me... but, to show how unscientific my approach is, if it doesn't work, I then turn the mids up... and that sometimes does too!! LOL