NHTSA Complaint #11553491 — 2018 BMW X5

So I test drove a BMW X5 e drive a couple months ago at an independent used car dealer and it looked perfect but when I drove it the car bounced excessively over any minor bump in the road. It felt like sitting in the back seats in a school bus not like driving a luxury SUV. They offered to fix it but I just felt like I couldn't trust them after this experience. I chalked this experience up to a used car dealership just trying to pass off a car to someone who might not notice the suspension being broken. So I've been searching for a couple months to find the perfect one at a bigger more trustworthy car dealer. I ordered one online at carmax and had this car delivered Friday and my husband/I hopped inside to grab some lunch and take it for a spin only to realize this second 2018 BMW X5 hybrid also has a broken suspension. It was bouncing seconds after each minor bump in the road. Additionally it had an error saying that the hybrid battery was not holding charge that we noticed the moment we got into the car. Carmax said they charged it before dropping it off and then it was discharged completely when we received it. Plus we noticed that the back end of the car was 4-6" lower from the front end, whereas the front had a couple inch clearance over the tires and the back was covering the top couple inches of the tires. We switched from comfort to sport & it did seem to limit the bounce but still there is something clearly wrong so CARMAX towed it away Friday night in September the day I got the car. Carmax repaired the suspension with bmw parts & now 6 weeks later the suspension is broken again. Carmax has offered to repair but I’m very concerned that there is a bigger.I checked the VIN for recalls and searched the internet for similar issues with no luck. I also emailed BMW for their take and they said that they’ve never heard of any issues. . Are faulty suspensions a thing with this car??? Should I keep it if they fix?don't need a car with endless issues??