Olive oil
is fine for sauteing, and frying, so long as it does not exceed 350 f. in temp., otherwise it's molecules become a saturated fat.
Trans fat free oils are better for frying and deep or pressure frying, but not perfect. Those include Peanut oil, corn, saflower, canola, etc.
Tropical oils like coconut, palm kernel, or any hydrogenated vegetable oils are not as healthy.
Olive oil has a low smoke point, so can burn also. You can add butter to increase the smoke point, and it's healthier than hydrogenated fats.
I made shrimp scampi last night that way. The garlic didn't burn either. Burnt garlic is bitter. I added a splash of white wine and let the alcohol evaporate.