All refined oils are bad.
They have also been oxidized and damaged by high heat during processing. Hydrogenated oils include margarine and vegetable shortening. This goes a long way in explaining why olive oil has such a good reputation health-wise. The reason why olive oil is sold unrefined, while other seed oils are not, is because olive oil has so much omega-9 fatty acid, which resists spoiling. But omega-9 is not particularly nutritious.