Suspension Noise problems of the 2014 Kia Motor Optima

Hi my name is james I have 2014 kia Optima lx. I have the car since it had 2 miles and now has 14700. What is ridiculous is the struts make clunking noise over speed bumps. The car changes lane by its self. You can hold the steering wheel center and the car goes to the left. Took it to the dealer and they said it's normal. Lies all lies . Please tell me how my struts have a small leak but not enough to do anything about it I thought it was a new car. It seems like the car was made poorly and rushed. I also feel as if kia is lying about gas mileage again. The steering feels terrible when you are on the highway. They are a sad excuse for a car company and am completely disappointed with them. The refuse to help to acknowledge that there is an issue with the Optima steering I have a family member with a 2013 kia Optima lx with the same steering issue. So tell me how do they have the same steering issue if the 2014 was redesigned. The car seems like it leaks air into the cabin they say other wise. I'm not a happy customer and won't be till they put a recall for mpg. Suspension. Steering and brakes.