It does not show any wheel marks or scratching due to it's

Is thick enough to support chair wheels without any indenting.

I think swapping out the hard wheels for something with soft rubber will rectify this.

second of all not the right shape, third my wheels sunk into it, and fourth, it "migrated" across the floor (other than that I loved it).

It is along this seam, that the wheels of my chair have begun to crack

lb and the 5 castors on my chair were also upgraded to 3" "rollerblade" type wheels... which probably helps to avoid the pressure points that could cause cracking with standard hard plastic wheels.

Once you were in one spot for about a minute, the wheels would form dents in the mat and make you somewhat stuck.

You won't have any problems with wheels or chairs ripping holes through this

so I don't have one wheel on the carpet like before

I broke a wheel off my chair moving around on the carpet.

The wheels do not form any dents

Once these large cracks form, the structures will continue to degrade and even buckle, which like to trap the wheel of the chair, making it worse again

I have really good wheels on my chair (like about 2" total width) so this probably helps

No wheel dents in the mat!

wheels and carpet of any length are a no-go, and I've punched through too many of similar types to count