So sorry mayorblurps.  Those MA750i are just awfull  when compared to ANY iem  on the market - I  repeat ANY  iem sounds better than MA750i, even stupid little $10 ones ... Thought worthwhile to mention this very clearly before anyone else does the same mistake as I and buys one like I stupidly did.
Head-Fi readers deserve to be aware about  ****ty products too. And there is nothing more to say that this is the worse product I have heard in the whole of my life Baby..  I feel offended by all the reviewers that did not mention this. However some did say it was **** I should have read their review before.

I bought the Ken's a few years ago, and I do recall that they needed some burn in time.

At first they sounded ok but not amazing - nowhere near as awful as you infer - so i carried on using them. I then read up about them needing some playing time, so let them run continuously over a weekend.

After that, they sound so much better and I could genuinely understand what people were raving about. The M750i's need a small bit of TLC - and a good fitting era tip - but once done, that sound and perform very well. It should also be noted that they are one of the best builds out there. Of all the IEMs I own, they are the only pair I know will stand up to serious outdoor wear and tear. They're pretty indestructible.

I hope you give them a little more time and a good burn in - hopefully that will ease you concerns over their performance.

They really do sound good but right out of the box they don't.
Their balance is way off,  treble is harsh and tizzy sounding, bass sounds weird.
 
But after a day of burn in everything settles down and the detail it presents is amazing, the bass sounds great, the treble smoothens, and the vocals come out really clear. 
 
Worth the price