Defective Apple watch SE

Hi. I have a big trouble with Apple Watch SE. During 1,5 year I was forced to change it for new one twice!!!! Once by warranty… It was the same problem: the screen began to blink in different colors, there ware on the screen stripes of different colors appeared the screen began to heat up very much. It was like a rainbow. It was no contact with water, charger was original. The first time gave it to the official support lab. It was warranty and I have taken new watch but in 8 months it was the same problem. What I have to do? My warranty has finished. But there is the same problem with new watch. Do you know about this problem? Can I send it for expertise and take my money back or new watch. With best regards. Andrey. Israel.