Incidentally:
replyChatGPT: Ran me in circles as you describe; suggested a number of things I didn't understand, including commands that don't work in the BusyBox shell. (It's not a normal shell)
Gemini: Nailed it on selecting an older kernel in the Grub menu.
For me none of the LLMs helped so I had to bite the bullet and read scatterted documentation myself.
reply