My experience is different. I have their [2024] 55QM751G and PQ is great for movies, sports, regular TV, and black/white movies. You must not have the right adjustments. I am in MOVIE mode. Software update is v113, OTA. They say the Beta software V231 is better, which you have to do yourself.
I even read that their new QM7K model, is not as strong as the QM7 [2024], in some areas. But, I would buy. TCL has become a real and better PQ, mini LED, than some named competition. OLED has burn in issue.