Second this. Canonical is currently winning the race to the bottom for tech interviews (I'm speaking with a couple of decades of experience on both sides of the table). They use lots of AI on their side (of course, none allowed on your side). A strange focus on your school years. Dark patterns in technical questions with no opportunity to get clarity. Ghosting afterwards. Interviews always involve some asymmetry but Canonical exploits that to the maximum.

Sad to hear - putting these things on Glassdoor can help more people avoid these situations.