I'm like the others ... I like to get up often.
BUT you are asking for a different solution
One thing you can try is to replace the chair, or the wheels on the chair that you have. Wheels that are more conducive to rolling on carpet. This would be a larger size solid rubber wheel - something similar to what would be used on a rolling cart.
I also noticed that the mats you are using are the shaped mats (with cut out in foot area). You can try using multiple square or rectangle mats and butt them up against each other. I think you'll still have a problem though as most mats that I know of have a lip on the edge and you might get stuck in the lip.