I recently installed Kali with Mate.
The CPU is on high load (average ~13.0) on idle.

The malfunction processes are dbus-daemon and Xorg.

My setup:
8400H and 16 GB ram without discrete card. Use full disk encryption.

I found a workaround: create an other user, with this my CPU load is good (~0.1).

I did not find any relevant log.
I disabled Marco compositort