I also refunded my Q90R. I spent a week fighting with support to try and get them to pass the issue over to the engineers to attempt to replicate but it was utterly futile. I'm not convinced support are even able to contact the engineering team. I genuinely have no idea how legitimate issues can progress through to firmware fixes if users can't get issues seen by the technical team. This is your flagship 4K TV, you'd think they'd be keen to handle reports of issues (I had multiple sets, all were identical). Awful. Absolutely awful.
Not my video, another owner's, but this shows it well.
Same with my Q70R, it’s been bugging me since I got it and at first thought it was game mode but narrowed it down the the freesync. If I turn the freesync off, the outlines are gone, but on ultimate it’s brutal. On basic the panel flickers nonstop.
On ultimate It’s almost like an old blue/red 3D movie effect except without the glasses.
Ended up looking for a thread like this after noticing some trail on players and ball in a famous football game version by EA 20 on Xbox One X (4K-HDR-VRR). The issue goes away turning off FreeSync. Pretty dissapointed since I purchased this TV for the VRR capabilities for gaming. I guess I will have to return the unit to Samsung if this can't be fixed.