Feel for you man. Saw a kid last summer trying to set timing on a 7.3 with a screwdriver and a prayer. TikTok has these guys thinking they can skip the real learning part.
My buddy Jake tried to help a kid last spring with his 6.0 that kept dying at stoplights. The kid swore it was the ICP sensor because a TikTok dude said so. Jake spent an hour trying to talk him into running a simple buzz test first but the kid just kept watching his phone. Finally he let the kid try his thing and the truck died again a block away. Turned out the harness was rubbed raw on the back of the passenger head, real basic stuff lol.