The king of all Ugly Golf Courses has to be Santa Anita for me. If you're a SoCal resident or have hit all the big names down here, GO SEE IT. There's nothing quite like it.
I don't know that it's that more ugly than any other SoCal parkland style public course. Maybe the surrounds, I guess, but it's no worse than Whittier Narrows, Hansen Dam, or Azusa Greens. I suppose what sets it apart is that it's actually a pretty decent golf course. I may be a bit biased, though, as I was born across the street, and played it probably three times a week during the high school golf season.