THE most sonically dissappointing (lp) you own of great music?

Has to be Bruce Springsteen's Born to Run.  The all-time worst recording of otherwise great music, probably due to being overdubbed countless times.  I have tried probably 20 different versions of this record and apparently it is trying to put lipstick on a pig.

I'll tell you what category of LP's are dynamically compressed.  Half-speed masters.  What a total rip-off they are.  When I was young and dumb (I am now old and dumb) I collected these things basically without listening to them, and when my rig improved, I learned just how bad they are.  Except for a few A&M half-speeds, I sold almost all of mine and bought the originals of the titles I wanted.  I also bought a lot of great new hardware with the proceeds.