Hello,
After all the working OS testing on my OPI PC i see that screen tearing is a big problem that has to be fixed. Otherwise a stable version of OS the cannot be released. Without it fixed i cannot use it.
Try a different distro like Armbian, I've yet to experience screen tearing on my OrangePi PC or on my OrangePi+ 2e, so its either Xunlong's buggy Linux builds, or a hardware defect. Probably poor quality Linux builds though.