That’s not strictly speaking scrum’s fault. The analysis meetings are not part of it, and the full-day biweekly meeting seems excessive - demo and planning when

That’s not strictly speaking scrum’s fault. The analysis meetings are not part of it, and the full-day biweekly meeting seems excessive - demo and planning when closing a sprint should be at most half a day. It sounds like the team is too big if you’re using so much time in meetings - takes a long time for everyone to do their demos and then still longer to plan the next sprint (too-big team = “too much capacity” - so planning all the work takes too long). Maybe split into two teams and have them pick work from the backlog independently, or have two backlogs depending on each sub team’s strengths.