Car rant

So I got a new car . Well new car to me. They showed me the car fax. The owner took very good care of the car. I've had the car for 6 months. I've had to change the head light 3 times now and one then is out again. I know how to change the head light. Dont touch the bulb as it can leak into the bulb and ruin it. And NOW my air conditioner is out. I tried recharging it still doesnt work. Theres no warranty but there is seriously something wrong with this car. Like the wiring or something. Van I ask for a trade in or for them to take it back?