So did it improve with burn in? I have the exact same feeling at first listen. I haven't tried the Piston 2 but it is genuinely one of the worst sounding IEM I have heard out of the box. I'm burning them in now while listening to my IM02 as the Piston out of the box was making me hate music.
I need to admit that my first impression of piston 2 wasnt good. I was like you. It was making me hate music. But After sometime, I realize its actually not bad. Mids were so recessed. The treble and bass was too much for me to begin with. So I simply just lowered them down and music sounds great now. Im not sure if its the burn in or eq had done the job. I probably just hate its original sound signature. But it's true that its sound quality is good. So Much better than my stock s3 samsung iem.
And oh my friend owns IM02 as well, and I can't decide which one is better lol