I found that video fascinating even though I couldn't really related to any of the tools he was talking about since I've never composed music in the past.
Having actually used Audacity and Photoshop, I'd love to learn a bit more about how those design decisions were made.
I've never composed either, but most of his complaints are not about the specifics of the programmes but about how they fail at communicating them. Repetition, omission, modality, hiding, or over-highlighting, are problems that can crop up in any software, and he's teaching you how those are perceived by users.
Having actually used Audacity and Photoshop, I'd love to learn a bit more about how those design decisions were made.