You don't make a very compelling case against the MA750i just by yelling how much you hate it. If you want someone to pay attention to your review, try elaborating, but coming from someone who says the A2s is a great IEM, I'm not sure what I expected.
 
You said you paid $75, which is much below the average price of a pair right now. Even if you don't like it, you can still resell it for a decent sum.

I'm with Cinder here.  I'm not really sure how these IEMs are so terrible, unless RHA offended you personally.  Or maybe you got a bad pair?  Either way, I highly disagree with everything you said and that's a pretty awful review.