Gameplay lag and screen tearing!

Not sure if we covered this in your prior threads, but now that you have Inspector how well does the game run in windowed mode? Inspector's frame capping should be covering that as well as full screen unlike vertical sync by way of the Control Panel only. Many players on Win 10 find that windowed gets rid of the screen tears and it just runs better that way for them, so they use Windowed Borderless Gaming which is a tool that makes what is still really windowed mode look almost just like full screen. Another thing to try is capping the frame rate to a slightly lower value, so maybe 59 or 58 fps. When a monitor reports in as running at 60 Hz, there could potentially be some "roundoff error" in that measurement.

I wouldn't go by performance being poor on 2x and 3x speeds as being a significant indicator. It does that for many on just about any hardware set and is more a function of the game engine tripping over itself and things happening out of order than anything we can really control. I only use speeds higher than 1x myself when I "really have to" (define that as you will) and my expectations are always low that the higher game speeds are really going to help move things along smoothly and any faster than Normal.