Later that day I have panic installed xiaomi.eu rom and it thankfully booted. Today I have followed every step again. (https://wiki.lineageos.org/devices/alioth/install/variant1)

1. Downgraded to 14.0.7.0 Miui, although its china firmware edition (https://wiki.lineageos.org/devices/alioth/fw_update/variant1)
2. Flashed “additional partitions” downloaded from microg site
3. Installed lineage recovery from their site
4. Factory reseted phone from recovery
5. Downloaded lineageos .zip from microg site
6. Run phyton script to verify .zip
7. Adb sideloaded .zip
8. Phone’s terminal again displayed something like “signature verification failed”, “status 1” and “rebooting may fail, continue?”
9. I rebooted and same situation as previous time occurred: boot animation, sound and black screen. Can hear “usb connected to pc” and “sound and turn off screen” sound.

It seems like python script is faulty

Should I give up now and reinstall stock?