Hi @itsjustme The blotches coud have been caused by bleeding, sometimes can be fixed to a degree by adjusting settings and cleaning. However may well require further attention and would be good idea to contact support. Some information here. https://www.gadgetreview.com/how-to-fix-clouding-on-led-tv
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 5.0,Android 13 .