Back around 2005, I worked with a guy who was trying to position himself as the go-to expert on the team. He'd always jump at the chance to explain things to QA and the support team. We'd occasionally hear follow-up questions from those teams and realize that he was just making things up. He was also had a serious case of cargo-cult mentality. He'd see some behavior and ascribe it to something unrelated, then insist…
I've got recent experience in exactly this - someone who is completely out of their depth, mis-representing their actual capabilities. Their reliance on AI is so strong because of this lack of depth - to such a degree that they never learn anything. Lately they've been creating drama and endless discussions about dumb things to a) try to appear like they have strong opinions, and b) to filabust the time so they don't have to talk about important things related to their work output.