Maybe "mismanaged" is too harsh. LA's patchwork governmental structure generally inhibits progress and keeps wealth and development concentrated in small areas instead of benefiting the broader metropolitan area. That's part of why you can go a few blocks in LA and your surroundings will change dramatically, often for the worse.
LA is top 1-5 in US cities by GDP (and to be fair so are the others you mentioned except for Seattle), so I personally see it as a hugely negative mark on our local and national character to have large parts of it be dirty, choked to death by traffic, have insanely high rents, etc. I don't know if other cities have quite as many structural aberrations in their governance as LA despite seeing many of the same issues - I don't know whether it would relieve or horrify me to learn that they don't.