Headphones

So i just got my new EW 200 as my first IEM and my first impression is very good. It has very good build and the package come with 3 sets of eartips which is kinda nice. But the problem begins when i listen to some tracks, IT’S TOO SIBILANT like the s and t sound really piercing especially the s sound. I try to Eq it by lowering the 7k hz by -9 db and it’s still really bright for me. Is it bc I’m treble sensitive? or mine hadn’t burn in yet? and is there any way that i can fix this plz help i’m kinda disappointed since this is my first IEM and i hear a lot of good things abt it🥲