Another problem is that vendors who transport/sell the stuff don't treat it properly. It's more delicate than other vegetable oils, it goes rancid easily and needs to stay refrigerated. I've seen it delivered to stores in unrefrigerated trucks, or you can mail order and it's not coming in a cooler, shit, that stuff is shot before the bottle is even opened. There are plenty of people who have used flaxseed oil and don't know what it should taste like.
If you can actually get good flaxseed oil and use flavors that work with it (strong fruity flavors, strong vinegars) it makes a nice salad dressing.