That's because you don't know how to clean/cook them.
Filet, skin and cut the blood line out. Soak the filets in heavily salted ice water for about an hour (adding more ice as necessary). This pulls the oil out and whitens/firms the meat. Rinse, dry and dredge in an egg wash, coat with Italian bread crumbs and fry in oil (either pan fry or deep fry). They are also very good smoked or slightly poached and made into fish cakes.
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