TLDR: After flashing stock, Magisk, rebooting, configuring, rebooting and using TWRP (volatile) to flash NetHunter, no animation logo, no proper boot - The white Google log stays forever (and CPU heats dangerously for hours)

I'm trying to install NetHunter on a Nexus 5X. Can you pinpoint where the faulty step is / direct me to a .. better/working tutorial please ?

  • I fastboot TWRP, twrp-3.5.2_9-0-bullhead.img (no persistent install, just to be sure to not mess up the recovery partition)
  • As I don't have any important data, I full wipe, reformat userdata and so on (*)
  • I flashed the stock rom, bullhead-opm7.181205.001-factory-5f189d84.zip (*) - except cache.img extracted from bullhead-n4f26u-factory-e6420fc1.zip
  • Before rebooting I flashed Magisk-v22-0.zip
  • Reboot, fill the first boot setup wizard, run Magisk which performs two updates
  • Get an adb shell, then su # success, Magisk is working
  • Fastboot TWRP again, send nethunter-2021.1-bullhead-oreo-kalifs-full.zip
  • Install nethunter-2021.1-bullhead-oreo-kalifs-full.zip
  • ..
  • Then reboot .. no boot, just a white Google logo and the animation never gets started


What is missing ? What versions can/must I use ?
It looks like I followed every advice : OREO 8.1.1, Latest TWRP (non-persistent), AVB/Encryption disabled, NetHunter-2021-bullhead-oreo ..
Any help welcome - I can test a lot of different things (and have been for the past month)

PS: (*) Just to be clear I'm not (that a) n00b, here's the recipe I came up with to (sic) start fresh :
Code:
fastboot format userdata && fastboot format cache && fastboot flash bootloader bootloader-bullhead-bhz32c.img && fastboot reboot-bootloader && sleep 6 && fastboot flash radio radio-bullhead-m8994f-2.6.42.5.03.img && fastboot reboot-bootloader && sleep 6 && fastboot erase cache && fastboot flash cache cache.img && fastboot flash boot boot.img && fastboot flash recovery recovery.img && fastboot flash vendor vendor.img && fastboot flash system system.img && fastboot boot ~/Downloads/twrp-3.5.2_9-0-bullhead.img && sleep 30 && adb push ~/Downloads/Magisk-v22-0.zip /sdcard/Magisk-v22-0.zip
PS2: 'd be Happy to publish a very detailed tutorial upon resolution