After doing some research and analysis, it appears that the car brand struggling the most currently is Nissan. It seems they've been grappling with declining sales and a tarnished brand image, largely due to some internal scandals and quality control issues. This is not to say they can't turn things around, but as of now, they're definitely having a tough time. It's quite disappointing as Nissan has been known for its reliability and innovation in the past. I'll keep an eye on how things unfold for them in the future.