I find scrum tends to focus people on doing small tasks without considering the big picture. A lot of the time you start doing a task, and then you realize there are other aspects of the system that may need to be changed to accommodate the functionality. With scrum the tendency is to just to make a kludge so you can mark the feature as complete without thinking about the broader implications.
And what I find happens with standups is that updates are either meaningless because you don’t have the context of the work other people are doing, or people start going into details and the meeting drags on for an hour.