Hi gagarine42,
Thank you for reaching Microsoft Community. I understand that you are having issues with regards to the sensitivity of the touchpad and apologies for the inconvenience this has caused you.
In regards to the driver, yes it is the HID-compliant touchpad that is designated for the touchpad driver and disabling the driver in Device Manager will disable all functions of the touchpad.
For the palm rejection that you mentioned, do you mean the Ignore touch when I'm using my pen option in the Pen & Windows Ink page? If yes, this function or feature is for the screen of the device when using a pen to write on the screen. For the touchpad, it would detect the detect fingers placed on it like if you have 2 fingers (for example resting your thumb on it while navigating the touchpad using the index finger) on the touchpad which may cause a random movement once the touchpad detects the other finger resting.
The Surface Laptop Studio has a large haptic touchpad also that gives you realistic feedback when you tap it like you'll hear it click when you're using it. See: Surface Laptop Studio features (microsoft.com).
How about setting the touchpad sensitivity from Most sensitive to Medium or Low sensitivity, do you experience some improvements on the behavior?
Please try also running the steps below to make sure that the device has all the updated drivers and software it needs to run smoothly and see if you get some improvements on the touchpad behavior:
1: Run Surface Diagnostic Toolkit
See: Fix common Surface problems using the Surface Diagnostic Toolkit (microsoft.com)
2: Check for Windows Update
Go to Windows Settings > Update & Security and select Check for updates
Make sure all updates need are installed including Optional updates
3: Update drivers and firmware
Check what is the current OS Build of your Windows version by going to Settings > System > About.
Go to Download driver and firmware for Surface, choose Surface Laptop
Then click the link next to Surface Laptop Studio then click Download on the next page.
Choose the .msi file that matches your current OS Build and click Next.
After downloading, run and install the .msi then Restart.
Kind regards,
Marrion