Here's a few examples but there's probably a lot more.
Some examples:
1) Unified inbox: You have to click the filter button to drop it down, then click again to filter.
2) Within the message: You have to click to show the date/time stamp.
3) On the booking page, why are there tabs for charges, transactions, legal, etc etc? Is there a reason this can't all be on the same page without having to click all over the place?
All of this seems super unnecessary and easy to fix, so there must be a reason?