Samsung 58" Q60T QLED TV - Persistent Shadow Issues

I've been really annoyed with my Samsung 58" Q60T QLED 4K UHD Smart TV lately. It shows dark shapes on white backgrounds, and these distortions are even more obvious on backgrounds with solid colors. I asked for a service inspection on July 4, 2023, to deal with the problem. After checking, the service technicians said that they didn't find any obvious issues when they tested it with their equipment. They told me that everything was fine. But the weird wavy lines on white backgrounds kept happening. This experience has been really frustrating. I thought the Samsung TV would work better, and it's disappointing that the problems haven't been fixed yet. I've lost confidence in the brand's quality. I can't help but wonder if these issues will ever be resolved. I'm still frustrated with my TV, and it seems like a lot of other people are dealing with the same problems.