Thanks for advice. I decided to roll back with snapshot. At first it went well up to garuda snapshot loader asking to reboot immediately. But then the bootloader was missing and I got to grub 2.06 with minimal editing capabilities. So I had to use the live usb medium to fix the boot loader and now I’m almost back in the square one, wondering if I could somehow upgrade the system without breaking it.
Regarding to the question about how exactly did I install Wifi driver: That is an another thread here https://forum.garudalinux.org/t/realtek-rtl8192eu-wifi-adapter-unstable-no-connection/41016 as at first, I had issues with unstable connection and I followed the guidelines I got from here. The driver is from AUR.