The sorting orders are the most weird (but still way better than Airbnb where you control nothing and are doomed to scroll an infinite list). For example, teh sort order I use most often is to sort by price, but I need to start from the most expensive offers as I'm looking for (the pretenders to the) best places in a given area. Unfortunately, Booking.com allows to sort by price in one direction only, so I have to start from the end and from the bottom of each page. Weird but easy to solve.
But what I hate is that they won't let me sort by rating! Why do they include ratings, though? They present several weird options I'd never use as they are optimized to land me with a place I don't want. I just want to sort by rating - and let me decide if the number of ratings received makes it trustworthy.